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  Subjects -> ELECTRONICS (Total: 179 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 7)
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 5)
Advances in Electronics     Open Access   (Followers: 78)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Microelectronic Engineering     Open Access   (Followers: 13)
Advances in Power Electronics     Open Access   (Followers: 33)
Advancing Microelectronics     Hybrid Journal  
Aerospace and Electronic Systems, IEEE Transactions on     Hybrid Journal   (Followers: 313)
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 24)
Annals of Telecommunications     Hybrid Journal   (Followers: 9)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 9)
Archives of Electrical Engineering     Open Access   (Followers: 13)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 28)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 19)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 36)
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 12)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 1)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 47)
China Communications     Full-text available via subscription   (Followers: 8)
Chinese Journal of Electronics     Hybrid Journal  
Circuits and Systems     Open Access   (Followers: 15)
Consumer Electronics Times     Open Access   (Followers: 5)
Control Systems     Hybrid Journal   (Followers: 266)
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 105)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 86)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 92)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elkha : Jurnal Teknik Elektro     Open Access  
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 51)
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage Materials     Full-text available via subscription   (Followers: 3)
EPJ Quantum Technology     Open Access  
EURASIP Journal on Embedded Systems     Open Access   (Followers: 11)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 6)
Foundations and Trends® in Signal Processing     Full-text available via subscription   (Followers: 10)
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
Geoscience and Remote Sensing, IEEE Transactions on     Hybrid Journal   (Followers: 189)
Haptics, IEEE Transactions on     Hybrid Journal   (Followers: 4)
IACR Transactions on Symmetric Cryptology     Open Access  
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 97)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 77)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 46)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 9)
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits     Hybrid Journal   (Followers: 1)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 66)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 70)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 56)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 19)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 40)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 19)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 26)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 71)
IEEE Transactions on Signal and Information Processing over Networks     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 5)
IET Cyber-Physical Systems : Theory & Applications     Open Access   (Followers: 1)
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 35)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 46)
IET Smart Grid     Open Access  
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 18)
IETE Journal of Education     Open Access   (Followers: 4)
IETE Journal of Research     Open Access   (Followers: 11)
IETE Technical Review     Open Access   (Followers: 13)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access   (Followers: 3)
Industrial Electronics, IEEE Transactions on     Hybrid Journal   (Followers: 58)
Industry Applications, IEEE Transactions on     Hybrid Journal   (Followers: 24)
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription   (Followers: 1)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 13)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 18)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 10)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 5)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 6)
International Journal of Control     Hybrid Journal   (Followers: 12)
International Journal of Electronics     Hybrid Journal   (Followers: 7)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 13)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 2)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 14)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 8)
International Journal of Nano Devices, Sensors and Systems     Open Access   (Followers: 12)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 4)
International Journal of Power Electronics     Hybrid Journal   (Followers: 24)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 4)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 10)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 6)
International Transaction of Electrical and Computer Engineers System     Open Access   (Followers: 2)
JAREE (Journal on Advanced Research in Electrical Engineering)     Open Access  
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 3)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 10)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 4)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 24)
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 7)
Journal of Electrical, Electronics and Informatics     Open Access  
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 7)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 8)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronics (China)     Hybrid Journal   (Followers: 4)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Engineered Fibers and Fabrics     Open Access  
Journal of Field Robotics     Hybrid Journal   (Followers: 2)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 167)
Journal of Information and Telecommunication     Open Access   (Followers: 1)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 3)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 7)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 9)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal  
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal  
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 10)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 4)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 28)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 11)
Journal of Semiconductors     Full-text available via subscription   (Followers: 5)
Journal of Sensors     Open Access   (Followers: 26)
Journal of Signal and Information Processing     Open Access   (Followers: 9)
Jurnal Rekayasa Elektrika     Open Access  
Jurnal Teknik Elektro     Open Access  
Jurnal Teknologi Elektro     Open Access  
Kinetik : Game Technology, Information System, Computer Network, Computing, Electronics, and Control     Open Access  
Learning Technologies, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Magnetics Letters, IEEE     Hybrid Journal   (Followers: 7)
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 5)
Microelectronics and Solid State Electronics     Open Access   (Followers: 18)
Nanotechnology Magazine, IEEE     Full-text available via subscription   (Followers: 33)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal  
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Electrical & Electronic Engineering Journal     Open Access  
Open Journal of Antennas and Propagation     Open Access   (Followers: 8)
Optical Communications and Networking, IEEE/OSA Journal of     Full-text available via subscription   (Followers: 15)
Paladyn. Journal of Behavioral Robotics     Open Access   (Followers: 1)
Power Electronics and Drives     Open Access   (Followers: 1)
Problemy Peredachi Informatsii     Full-text available via subscription  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Pulse     Full-text available via subscription   (Followers: 5)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Advances in Communications and Networking Technology     Hybrid Journal   (Followers: 3)
Recent Advances in Electrical & Electronic Engineering     Hybrid Journal   (Followers: 9)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 5)
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 53)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 4)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 75)
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 13)
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 2)
Synthesis Lectures on Power Electronics     Full-text available via subscription   (Followers: 3)
Technical Report Electronics and Computer Engineering     Open Access  
TELE     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 9)
Universal Journal of Electrical and Electronic Engineering     Open Access   (Followers: 6)
Visión Electrónica : algo más que un estado sólido     Open Access   (Followers: 1)
Wireless and Mobile Technologies     Open Access   (Followers: 6)
Wireless Power Transfer     Full-text available via subscription   (Followers: 4)
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 11)
Електротехніка і Електромеханіка     Open Access  

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Similar Journals
Journal Cover
Magnetics Letters, IEEE
Journal Prestige (SJR): 0.532
Citation Impact (citeScore): 2
Number of Followers: 7  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1949-307X
Published by IEEE Homepage  [191 journals]
  • Flexible Control of Magnetic Fields by Shaped-Optimized Three-Dimensional
           Coil Arrays
    • Authors: Ali Abdolali;Ali Mohtadi Jafari;
      Pages: 1 - 5
      Abstract: The synthesis of desired low-frequency magnetic fields is of high importance in electromagnetic design. The use of coil arrays (CAs) is among the most effective methods for realizing a desired field. However, in designing CAs, researchers are faced with a lack of design parameters. At low frequencies, the design parameters are usually limited to the size and phase of the source and the size and position of the coils. In this letter, with the help of three-dimensional (3-D) coils, the spatial current distribution, i.e., the shape of coils, is added to the design parameters of the CA problem. This novel 3-D coil array creates a high degree of freedom for the synthesis of the desired magnetic field which cannot be achieved by ordinary coil arrays or a single 3-D coil. The technological advances in the field of 3-D printing helps in the fabrication of these 3-D structures with high precision, low cost, and fast prototyping. In the design process, dyadic Green's functions are used to analytically calculate the magnetic field. Then, in order to define the shape of the 3-D coils, these shapes are extended based on the proper basis functions. By determining the coefficients of these basis functions by means of optimization methods, the shape of each 3-D coil in the array is obtained. This method is used to realize an arbitrary magnetic field along a line by means of a single-source array that includes three 3-D coils. The designed array is implemented with the use of fused-deposition-modeling 3-D printing. The design results, numerical simulations, and experimental tests demonstrate a high degree of accuracy in the fabrication process and the ability of 3-D arrays to synthesize magnetic fields.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Precise Model-Free Spline-Based Approach for Magnetic Field Mapping
    • Authors: Federico Ongaro;Christoff Marthinus Heunis;Sarthak Misra;
      Pages: 1 - 5
      Abstract: Untethered magnetic manipulation has found applications in a rapidly increasing number of fields, ranging from minimally invasive surgery to assembly of industrial microelectromechanical systems. Despite this relevance, present-day literature on precise magnetic mapping is sparse, especially for magnetic fields affected by external disturbances. In this letter, we address this deficiency by introducing a model-free mapping technique. Remarkably, the presented spline-based approach is capable of addressing the presence of inhomogeneous static disturbances and the mapping of nonazimuthally symmetric electromagnets. This work is validated with the mapping of nine metal-core electromagnets in the presence of inhomogeneous static disturbances. A grid of 5120 measurements is collected by a custom-programed robotic arm and used for mapping. The values predicted by the approach are compared against 3430 independent field measurements with an R2 value of 0.9884 and maximum relative errors of 7%. Overall, this spline-based approach provides a flexible technique for the precise mapping of electromagnetic fields and gradients even when, for reasons regarding coil shape or disturbances, the electromagnetic field does not present any axial symmetry.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Electromagnetic Position Sensing and Force Feedback for a Magnetic Stylus
           With an Interactive Display
    • Authors: Peter Berkelman;Bernadette Tix;Hamza Abdul-Ghani;
      Pages: 1 - 5
      Abstract: This letter describes the design, implementation, validation, and demonstration of an electromagnetic system that can be incorporated into a graphical display to provide computer-controlled planar feedback forces on the tip of a stylus or fingertip-mounted magnet held near the display surface, according to the magnet position and virtual fixtures implemented in software. An array of magnetometer sensors is used to detect the position of the magnet, while a pair of box-shaped coils behind the display produces feedback forces on the stylus parallel to the plane of the display. Electromagnetic analysis for the system design is presented and system implementation is described. Validation results are given for force generation within a 100 mm × 100 mm area and force interaction with a virtual obstacle is demonstrated.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Experimental Validation of a Frequency-Selective Surface-Loaded Hybrid
           Metamaterial Absorber With Wide Bandwidth
    • Authors: Atipriya Sharma;Ravi Panwar;Rajesh Khanna;
      Pages: 1 - 5
      Abstract: The achievement of wide absorption bandwidth for a single-layer metamaterial absorber remains a challenge. In this letter, a frequency-selective surface (FSS), single-substrate layer, broadband metamaterial absorber is investigated theoretically, experimentally, and by simulation in the frequency range of 2–18 GHz. Simulations of the reflection coefficient of the absorber with different substrate dielectric thicknesses, FSS thicknesses, and FSS dimensions indicate that there exist optimal values for the absorber design. The measured results from a fabricated prototype are in close agreement with the simulations, suggesting the effectiveness of the structure for actual electromagnetic applications. The fabricated absorber with thickness 2.0 mm has a minimum reflection coefficient of −29.0 dB at 12.2 GHz. The −10 dB absorption bandwidth is 7.5 GHz in the range of 8.5–16 GHz. Effective complex electromagnetic parameters are extracted to quantitatively understand the absorption. A miniaturized structure, single-substrate layer, simple geometry, and wide bandwidth are some of the key features of the proposed metamaterial absorber.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Frequency Response of a Moving Two-Dimensional Defect in Magnetic Flux
           Leakage Inspection
    • Authors: Mustafa Makki Aziz;Reyah Abdulla;Mohamad Al-Dujaili;
      Pages: 1 - 4
      Abstract: The detection of magnetic flux leakage (MFL) enables nondestructive detection and characterization of defects in magnetic structures. In this letter, Fourier transforms of the leakage fields from a two-dimensional surface defect are evaluated to produce analytical expressions for the frequency response of MFL signals detected by a flux-sensitive sensor. The expressions show the correlation between the spectral response of the leakage fields, defect dimensions, and sensing element lift-off spacing as a product of frequency-dependent defect-width loss function, spacing loss function, and thickness enhancement function. The lower and upper band edges of the band-limited leakage magnetic fields are theoretically identified. A spectral method for sizing of defects is proposed based on the frequency response.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • $text{Bi}_{0.90}text{Nd}_{0.10}text{Fe}_{0.98}TM_{0.02}text{O}_{3}$ +( $TM=+text{Mn}$ ,+Co,+Ni,+and+Cu)+Materials&rft.title=Magnetics+Letters,+IEEE&rft.issn=1949-307X&rft.date=2019&rft.volume=10&rft.spage=1&rft.epage=5&rft.aulast=Minh;&rft.aufirst=Dao&rft.au=Dao+Viet+Thang;Nguyen+Manh+Hung;Du+Thi+Xuan+Thao;Le+Thi+Mai+Oanh;Do+Danh+Bich;Nguyen+Cao+Khang;Van+Quang+Nguyen;Nguyen+Van+Minh;">Structural, Electrical, and Magnetic Properties of
           $text{Bi}_{0.90}text{Nd}_{0.10}text{Fe}_{0.98}TM_{0.02}text{O}_{3}$ ( $TM=
           text{Mn}$ , Co, Ni, and Cu) Materials
    • Authors: Dao Viet Thang;Nguyen Manh Hung;Du Thi Xuan Thao;Le Thi Mai Oanh;Do Danh Bich;Nguyen Cao Khang;Van Quang Nguyen;Nguyen Van Minh;
      Pages: 1 - 5
      Abstract: Pure BiFeO3 (BFO) and $text{Bi}_{0.90}text{Nd}_{0.10}text{Fe}_{0.98}TM_{0.02}text{O}_{3},(TM= text{Mn}, text{Co}, text{Ni}, text{and},text{Cu})$ materials have been synthesized by the sol-gel method. Effects of codoping Nd and transition metal $(TM)$ on the structural, electrical, and magnetic properties of BFO were investigated by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy, scanning electron microscope (SEM), vibrating sample magnetometry, polarization vs. electric field hysteresis loops $(P{-}E)$, and complex impedance spectra measurements. A distortion of crystal structure, in which lattice parameters $a$ and $c$ decreased in all codoped samples, was measured by XRD. SEM images showed a significant reduction of average grain size and an obvious change in surface morphology with Nd and $TM$ codoping in BFO. Codoped samples demonstrated various improvements in ferroelectric and ferromagnetic properties, most notably for codoped (Nd and $TM$) samples. Saturation magnetization $(M_{s})$ and saturation dielectric polarization $(P_{s})$ increased from $M_{s}= 0.060 text{emu}/ text{g}, P_{s}= 1.03$ µ$text{C}/ text{cm}^{2}$ for pure BFO to -inline-formula>$M_{s}= 0.411 text{emu}/ text{g}, P_{s}= 11.08$ µ$text{C}/ text{cm}^{2}$ for a codoped (Nd and Mn) sample. Our results show that Mn is the best $TM$ for codoping with Nd in BFO to improve its multiferroic properties.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Activation of Microwave Signals in Nanoscale Magnetic Tunnel Junctions by
           Neuronal Action Potentials
    • Authors: Jose Miguel Algarin;Bharath Ramaswamy;Lucy Venuti;Matthews E. Swierzbinski;James Baker-McKee;Irving N. Weinberg;Yu-Jin Chen;Ilya N. Krivorotov;Jordan A. Katine;Jens Herberholz;Ricardo C. Araneda;Benjamin Shapiro;Edo Waks;
      Pages: 1 - 5
      Abstract: Action potentials are the basic unit of information in the nervous system, and their reliable detection and decoding holds the key to understanding how the brain generates complex thought and behavior. Transduction of these signals into microwave signal oscillations can enable wireless sensors that report on brain activity through magnetic induction. In this letter, we demonstrate that action potentials from the lateral giant neurons of crayfish can induce microwave oscillations in nanoscale magnetic tunnel junctions (NMTJs). We show that action potentials activate microwave oscillations in NMTJs with an amplitude that follows the action potential signal, demonstrating that the device has both the sensitivity and temporal resolution to respond to action potentials from a single neuron. The activation of magnetic oscillations by action potentials, together with the small surface area and the high-frequency tunability, makes these devices potential candidates for high-resolution sensing of bioelectric signals from neural tissues. These device attributes may be useful for the design of high-throughput bidirectional brain–machine interfaces.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Transcranial Magnetic Stimulation: Development of a Novel Deep-Brain
           Triple-Halo Coil
    • Authors: Priyam Rastogi;Erik Gordan Lee;Ravi L. Hadimani;David C. Jiles;
      Pages: 1 - 5
      Abstract: Transcranial magnetic stimulation (TMS) is a noninvasive treatment for major depressive disorder. TMS coil design plays an important role in maximizing the magnetic field strength at the required location in the brain. Development of deep-brain TMS coils to stimulate subcortical structures will expand the uses of TMS beyond the simulation of superficial cortical targets. The simulation of deep-brain regions may have beneficial effects on neurological disorders such as Parkinson's disease, posttraumatic stress disorder, and mild traumatic brain injury. In this letter, a multicoil configuration, the triple-halo coil (THC), which can stimulate deep brain structures such as the hippocampus and amygdala, is designed and tested. A finite element tool is used to determine the induced electric field and magnetic field in these regions due to the THC alone and in combination with a figure-of-8 coil. Analysis of the results is done with the help of an anatomically accurate heterogeneous head model of a 34-year-old man derived from magnetic resonance imaging. The magnetic field of the THC is measured and compared with the simulated field.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Magnonic Band Structure Established by Chiral Spin-Density Waves in
           Thin-Film Ferromagnets
    • Authors: Patrick Sprenger;Mark A. Hoefer;Ezio Iacocca;
      Pages: 1 - 5
      Abstract: Recent theoretical studies have demonstrated the possibility to excite and sustain noncollinear magnetization states in ferromagnetic nanowires. The resulting state is referred to as a spin-density wave (SDW). SDWs can be interpreted as hydrodynamic states with a constant fluid density and fluid velocity in systems with easy-plane anisotropy. Here, we consider the effect of the nonlocal dipole field arising from the finite thickness of magnetic thin films on the spatial profile of the SDW and on the associated magnon dispersion. Utilizing a hydrodynamic formulation of the Larmor torque equation, it is found that the nonlocal dipole field modulates the fluid velocity. Such a modulation induces a magnonic band structure unlike the typical dispersion relation for magnons on uniform magnetization. The analytical results are validated by micromagnetic simulations. Band gaps on the order of gigahertz are numerically observed to depend on the SDW fluid velocity and film thickness for realistic material parameters. The presented results suggest that SDWs can find applications as reconfigurable magnonic crystals.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • The Longitudinal Spin Seebeck Coefficient of Fe
    • Authors: Zhihao Duan;Bingfeng Miao;Liang Sun;Di Wu;Jun Du;Haifeng Ding;
      Pages: 1 - 5
      Abstract: We report an experimental study of the longitudinal spin Seebeck effect (LSSE) of a Fe thin film with a Pt detection layer. By varying the Fe thickness, we find that the anomalous Nernst effect (ANE) of Fe changes sign and vanishes at about 4.8 nm. This provides a unique opportunity to study the LSSE where the influence of ANE is absent. The addition of a 3 nm Pt layer produces a considerable thermal voltage, which comes from the LSSE of Fe solely. The opposite signs of thermal voltages in Pt/Fe and W/Fe bilayer structures confirm that the signal is dominated by LSSE because Pt and W have opposite signs of spin Hall angle. In conjunction with the Pt-thickness-dependent measurement of effective spin-mixing conductance of Fe/Pt films, we estimate the spin Seebeck coefficient of Fe.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Soft Magnetism, Magnetostriction, and Microwave Properties of Fe-Ga-C
           Alloy Films
    • Authors: Xianfeng Liang;Cunzheng Dong;Sue J. Celestin;Xinjun Wang;Huaihao Chen;Katherine S. Ziemer;Michael Page;Michael E. McConney;John G. Jones;Brandon M. Howe;Nian X. Sun;
      Pages: 1 - 5
      Abstract: A systematic investigation of the soft magnetism, the change of modulus of elasticity with magnetization (ΔE effect), magnetostriction, and microwave properties has been carried out on iron-gallium-carbon thin films over a wide carbon content range. The phase transformation of the Fe-Ga-C films from bcc polycrystalline to amorphous leads to excellent magnetic softness with a low coercivity of less than 1 Oe, high saturation magnetization, narrow ferromagnetic resonance linewidth at 10 GHz of 20 to 30 Oe, and an ultra-low Gilbert damping constant of 0.0027. A record high piezomagnetic coefficient of 9.71 ppm/Oe, high saturation magnetostriction constant of 81.2 ppm, and large ΔE effect of -120 GPa at 500 nm were achieved.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Strong Coupling of Magnons to Microwave Photons in Three-Dimensional
           Printed Resonators
    • Authors: Vincent Castel;Sami Ben Ammar;Alexandre Manchec;Gwendal Cochet;Jamal Ben Youssef;
      Pages: 1 - 5
      Abstract: We report on ferromagnetic resonant mode hybridization in reentrant cavities made with a commercial three-dimensional (3-D) printer, followed by conventional 3-D metallization with copper and tin. The cavity volume was only 7% that of a standard cavity resonating at the same frequency while maintaining a high quality factor. Simulations were in very good agreement. We obtained an effective coupling of about 40 MHz in two cavities at room temperature. These experimental results demonstrate the utility of tunable filters based on complex 3-D printed cavities.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Effect of Dilute Rare-Earth Doping on Magnetodynamic Properties of
           Permalloy Films
    • Authors: Qian Chen;Yuli Yin;Honglei Yuan;Xiaochao Zhou;Zhaocong Huang;Jun Du;Ya Zhai;
      Pages: 1 - 5
      Abstract: Tunable magnetodynamic properties of magnetic materials will allow significant design freedom in spintronic devices. One of the most efficient methods to tailor magnetic properties is by element doping. Here, we study the effect of rare-earth (RE) doping on Permalloy (Py) films to modify the magnetic damping and exchange stiffness by both the ferromagnetic resonance uniform precession mode and the first perpendicular standing spin-wave mode. Results show that both static and dynamic magnetic properties of Py films are adjusted by doping with Gd, Tb, and Nd. The saturation magnetization is decreased by 59.4% with Tb, Gd, and Nd at concentrations of 10 at.%. The magnetic damping coefficient $(alpha)$ is enhanced mostly by Tb dopant, followed by Nd and Gd, indicating that spin–orbit coupling may be one of the main mechanisms in determining $alpha $ of RE-doped films. A 44.2% reduction of the exchange stiffness was achieved by doping with 3.3 at.% Nd. The results demonstrate that RE doping may be a viable technique for the control of magnetodynamic properties for spintronics applications.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Simultaneous Control of Interlayer Exchange Coupling and the Interfacial
           Dzyaloshinskii–Moriya Interaction in Ru-Based Synthetic Antiferromagnets
           
    • Authors: Aleksandr Prudnikov;Maxwell Li;Marc De Graef;Vincent Sokalski;
      Pages: 1 - 4
      Abstract: We present a Ru-based synthetic antiferromagnet (SAF) made with asymmetric ferromagnetic building blocks (Pt/Co/Ir or Ir/Co/Pt) to couple their interfacial Dzyaloshinskii-Moriya interaction (DMI) with strong interlayer exchange coupling (IEC). This combination may lead to new types of antiferromagnetic domain walls (DWs), which are conceptually presented in this letter. These include an energetically frustrated configuration and an “isolated” spin chain where a net magnetization exists only at the DW. While most SAF designs incorporate a Co/Ru/Co IEC layer, chiral SAFs require Pt and/or Ir at the Ru/Co interface. In all cases except Pt/Ru/Pt, a significant IEC field is preserved over a range of Ru thicknesses, with the largest occurring for Ir/Ru/Ir. These results demonstrate that ferromagnetic film stacks with purportedly strong DMI can be incorporated into SAFs without compromising IEC.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Laser-Reduced Zeolite Imidazole Framework-67 as Magnetic Absorbents for
           Oil Separation in Water
    • Authors: Junfeng Huang;Kam Chuen Yung;Guijun Li;Zhuoxun Wei;Zhengong Meng;
      Pages: 1 - 3
      Abstract: We reduced zeolite imidazole framework-67 by laser so as to prepare porous carbon materials embedded with cobalt nanoparticles. The composites exhibited ferromagnetic behavior. The parameters of laser reduction were optimized for oil absorption with high capacity and good reusability. This approach can open a new class of ferromagnetic porous absorbents and represent advancement toward overcoming the limitations of oil absorption.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Multistate Nanomagnetic Logic Using Equilateral Permalloy Triangles
    • Authors: Meshal Alawein;Selma Amara;Hossein Fariborzi;
      Pages: 1 - 5
      Abstract: We examine a multistate logic computation scheme based on nanomagnets with configurational anisotropy (CA). We present a case study of a structure comprising a thin equilateral triangle—exhibiting sixfold CA—and three surrounding bistable inputs/outputs, where all nanomagnets generally can be interconnected by nanomagnetic chains and adiabatically clocked by external magnetic fields. We analyze the design and operation of the triangle with three-dimensional micromagnetic simulations of the magnetization configurations and dynamics, the effect of thermal fluctuations, and the propagation of information to an output nanomagnet. As a proof of concept, we demonstrate reconfigurable nand/nor and or/and gates as potential logic applications. We highlight further applications and suggest directions for future research.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Peak in Angular Dependence of Coercivity in a Hexagonal Array of Permalloy
           Spherical Nanocaps
    • Authors: Yuset Guerra Davila;Frederico Alves Revoredo Júnior;Ramon Peña-Garcia;Eduardo Padrón-Hernández;
      Pages: 1 - 3
      Abstract: Micromagnetic simulations of coercivity as a function of external magnetic field direction were performed for a hexagonal array of hemispherical Permalloy nanocaps. The analysis was based on hysteresis loops for arrangements of nanocaps of variable thickness (5 nm and 10 nm). The angular dependence of coercivity had a maximum at about 80° with respect to the arrangement plane. An increase in coercivity with nanocap thickness is related to the magnetization reversal mechanism, where the dipole energy of individual caps generates an effective intermediate axis, locking the magnetic moments. The coercivity has maximum values of 109 Oe for 5 nm and 156 Oe for 10 nm thickness. The remanence decreases monotonically with angle. This is associated with the influence of shape anisotropy, where the demagnetizing field in the plane of the array is much smaller than the demagnetizing field perpendicular to the plane.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Signal Detection Under Multipath Intersymbol Interference in Staggered
           Bit-Patterned Media Recording Systems
    • Authors: Seongkwon Jeong;Jaejin Lee;
      Pages: 1 - 5
      Abstract: Bit-patterned media recording was invented with the aim of achieving high areal density. However, bit-patterned media recording suffers from two-dimensional (2-D) interference problems, including intersymbol interference in the down-track direction and intertrack interference in the cross-track direction. The 2-D interference corrupts the readback signal and degrades the performance of bit-patterned media recording. Unlike the layout of regular-array bit-patterned media, in the layout of staggered-array bit-patterned media, islands along neighboring tracks are displaced by a half-period from islands on the main data track; hence, in terms of intertrack interference, the islands on the main data track are predominantly affected by the closest four islands on neighboring tracks. To address this problem, a proper signal detection scheme for staggered bit-patterned media recording should be developed. In this letter, we introduce a multipath soft-output Viterbi algorithm for reducing the 2-D interference in staggered bit-patterned media recording. We investigate different partial response targets and compare the performances of the one-dimensional, two-dimensional, and proposed three-path soft-output Viterbi algorithm.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Magnetic Thin-Film Inductors With Induced Radial Anisotropy for Improved
           Inductance Density
    • Authors: Michael S. Lekas;Ryan Davies;Noah Sturcken;
      Pages: 1 - 4
      Abstract: This letter presents the design and electrical performance of integrated power inductors based on thin-film magnetic cores with radial anisotropy induced by in situ magnetic annealing. The magnetic anneal uses an additional coil, as part of the CMOS interconnect below the core, to simultaneously apply a biasing magnetic field and act as a resistive heater. Following annealing, devices demonstrated inductance enhancements as high as 8.8 times the original as-fabricated value, a peak inductance-to-dc resistance $(L/R_{{rm{dc}}})$ of 348 nH/Ω, a peak volumetric inductance density of 935 nH/mm3, and a peak areal inductance density of 33.4 nH/mm2. Additional improvements in inductor and bias coil design should further improve device $L/ R_{{rm{dc}}}$ ratios to greater than 450 nH/Ω.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Magnetic Loss Decomposition in Co-Doped Mn-Zn Ferrites
    • Authors: Samuel Dobák;Cinzia Beatrice;Fausto Fiorillo;Vasiliki Tsakaloudi;Carlo Ragusa;
      Pages: 1 - 5
      Abstract: The magnetic properties of sintered Mn-Zn ferrites, Co2+ enriched by addition of CoO up to 6000 ppm, were measured in ring samples for a broad range of peak polarization values (2-200 mT) and frequencies (dc - 1 GHz). The results were analyzed by separating the contributions to the magnetization process of domain wall motion and magnetization rotation, and applying the concept of loss decomposition. By determining the value and behavior of the rotational permeability μrot as a function of the CoO content, we obtain the average effective magnetic anisotropy and its effect on the loss. We thus identify the hysteresis (quasi-static) Wh, rotational Wrot, and excess Wexc loss components and their dependence on CoO. The quasi-static loss Wh, the domain wall permeability μdw, and have minima, and μrot has a maximum, for CoO in the range 3000-4000 ppm. The rotational loss by spin damping Wrot,sd is calculated by use of the Landau-Lifshitz equation by assuming distributed anisotropy field amplitudes. Wrot,sd covers the experimental loss behavior beyond about 1 MHz. Wexc and Wh, both directly generated by the moving domain walls, share the dissipative response of the material at lower frequencies and show similar trends versus CoO content. It is concluded that the modulation of the magnetic anisotropy of Mn-Zn ferrites through Co2+ enrichment, leading to maximum magnetic softening for CoO in the range 3000-4000 ppm, can be assessed in terms of separate effects of domain wall motion and moment rotations and their related dissipative properties.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Dy Electrodeposition on Sintered Nd-Fe-B
    • Authors: Runmiao Wang;Aizhi Sun;Huizhen Lang;Xiaotian Tang;
      Pages: 1 - 5
      Abstract: A low-cost, high-efficiency electrodeposition technique was used to enhance the coercivity of Nd-Fe-B. Dy was electrodeposited on the surface of a sintered Nd-Fe-B magnet in a nonaqueous solution. The use of the organic solvent dimethylformamide results in improved electrodeposition and adhesion compared to ethanol. A dense deposition layer was achieved when current density was
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • High-Sensitivity Three-Axis Vector Magnetometry Using Electron Spin
           Ensembles in Single-Crystal Diamond
    • Authors: Binbin Zhao;Hao Guo;Rui Zhao;Fangfang Du;Zhonghao Li;Lei Wang;Dajin Wu;Yulei Chen;Jun Tang;Jun Liu;
      Pages: 1 - 4
      Abstract: We demonstrate a three-axis vector magnetometer based on ensembles of negatively charged nitrogen vacancy centers in single-crystal diamond. A diamond with C3v symmetry was used to establish the coordinate system for vector magnetic field sensing. We control the external static magnetic field with three-axis Helmholtz coils. Four pairs of magnetic resonance peaks were obtained, which were used to calculate the three Cartesian components of the magnetic field with sensitivity of ~ 5 nT √Hz for each Cartesian component, free of interaxis error. The magnetometer is suitable for single-chip manufacturing.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
  • Correction to “Electrochemical Synthesis of Co-Rich Nanowires for
           Barcodes”
    • Authors: Sri Ramulu Torati;Xinghao Hu;Seok Soo Yoon;CheolGi Kim;
      Pages: 1 - 1
      Abstract: This erratum corrects scanning electron microscopy images and a magnetization curve that appeared in an article by the authors.
      PubDate: 2019
      Issue No: Vol. 10 (2019)
       
 
 
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