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An Equilibrated Error Estimator for the 2D/1D MSFEM T-Formulation of the Eddy Current Problem IEEE T. Magn. (IF 2.1) Pub Date : 2024-03-04 Markus Schöbinger, Karl Hollaus
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Deep Neural Network Detection with an ITI Subtraction for Non-Uniform Track-Width Two-Dimensional Magnetic Recording IEEE T. Magn. (IF 2.1) Pub Date : 2024-02-28 Chaiwat Buajong, Jaejin Lee, Chanon Warisarn
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A Simplified Model for Signals in the Magnetic Recording Channel and a Method for Characterization IEEE T. Magn. (IF 2.1) Pub Date : 2024-02-26 Roger Wood, Bogdan Valcu
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Effect of Magnetic Alignment and Magnetic Field Molding on Magnetic Properties of C-Shape Anisotropic Sr-Hexaferrites Permanent Magnets IEEE T. Magn. (IF 2.1) Pub Date : 2024-02-23 Ching-Chien Huang, Chih-Liang Chien, Min-Chih Chen, Ching-Shuan Liu, Chi-Ping Lee
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The Impact of Permanent Magnet Geometry on the Reading of Soft Magnetic Barcodes Using Magnetoresistive Sensors IEEE T. Magn. (IF 2.1) Pub Date : 2024-01-29 Sofia Abrunhosa, Ian Gibb, Maria Carvalho, Rita Macedo, Emrys Williams, Paulo P. Freitas, Susana Cardoso
Encoding information in patterns printed with magnetic ink can extend the usability of barcode and QR code technologies to applications that do not require a line of sight between the sensor and the code. Such an implementation garners an interest in security, track-and-trace, and recyclable packaging applications. Previous work has demonstrated a device that can read a barcode obscured by a layer
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Dynamic Characteristics and Energy Consumption of Electromechanical Converter of High-Speed On/Off Valve Under Multiple Motion Cycles Considering Eddy Current and Hysteresis IEEE T. Magn. (IF 2.1) Pub Date : 2024-01-26 Shaorong Chen, Qizheng Li, Hui Huang, Shumei Chen, Heng Du, Yuzheng Li, Jianchao Yu, Cong Qian
The current, electromagnetic force, and dynamic displacement of the high-speed on/off valve’s (HSV) electromechanical converter under stable working cycle are significantly different from those under the initial movement cycle. This phenomenon determines whether the electromechanical converter can continue to operate stably, and it also leads to temperature rise and high energy consumption over long
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In Memoriam Bruce A. Gurney 1957–2023 IEEE T. Magn. (IF 2.1) Pub Date : 2024-01-26 Matt Carey, Jeff Childress
Recounts the career and contributions of Bruce A. Gurney.
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Reduced Basis Approximation for Maxwell’s Eigenvalue Problem and Parameter-Dependent Domains IEEE T. Magn. (IF 2.1) Pub Date : 2024-01-25 Max Kappesser, Anna Ziegler, Sebastian Schöps
In many high-frequency simulation workflows, eigenvalue tracking along a parameter variation is necessary. This can become computationally prohibitive when repeated time-consuming eigenvalue problems must be solved. Therefore, we employ a reduced basis (RB) approximation to bring down the computational costs. It is based on the greedy strategy from Horger et al. 2017 which considers multiple eigenvalues
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Symmetric Formulation for Non-conforming Meshes in Magnetostatic Problems IEEE T. Magn. (IF 2.1) Pub Date : 2024-01-25 Houssam Houssein
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Magnetic Flux Paths in Single Sheet Tester as Modeled Numerically IEEE T. Magn. (IF 2.1) Pub Date : 2024-01-23 Georgi Shilyashki, Helmut Pfützner, Gerald Trenner
International standards assume that dissipative losses of the single sheet tester (SST) are restricted to the 450 mm long free sample region, according to negligible induction and losses in yoke and pole face regions. This article reports non-linear magnetic equivalence circuit calculation (MACC)-simulation of induction distributions, with focus on sample/yoke contact regions, for grain-oriented (GO)
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A Novel Magnetic High-Permeable Thin-Film Electroplated-On-Nail Approach for Electromagnetic Targeting in Intramedullary Interlocking-Nail Surgery IEEE T. Magn. (IF 2.1) Pub Date : 2024-01-23 Mayank Kohli, Tzu-Lin Chai, Yi-Lun Chen, Tze-Hong Wong, Wensyang Hsu, Tien-Kan Chung
In this article, we report a novel magnetic high-permeable NiFe thin-film electroplated-on-nail approach for electromagnetic targeting in intramedullary interlocking-nail surgery. The electromagnetic targeting system consists of a specific nail (on which a magnetic high-permeable NiFe thin film is electroplated onto specific outer and inner surfaces of the nail), a C-shape electromagnet module (includes
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Interfacial Resonance States-Induced Negative Tunneling Magneto-Resistance in Orthogonally Magnetized CoFeB/MgO/CoFeB IEEE T. Magn. (IF 2.1) Pub Date : 2024-01-15 Puyang Huang, Aitian Chen, Jianting Dong, Di Wu, Xinqi Liu, Zhenghang Zhi, Jiuming Liu, Albert Lee, Bin Fang, Jia Zhang, Xi-Xiang Zhang, Xufeng Kou
Magnetic tunnel junctions (MTJs) are essential for non-volatile magneto-resistive random access memory (MRAM) applications. Here, we report the observation of a negative tunneling magneto-resistance (TMR) in the CoFeB/MgO/CoFeB system with an orthogonally magnetized configuration. Through the modulation of the MgO thickness, the negative TMR component is up to 20% under a large negative voltage bias
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Fabrication of Magnetic Metal-Insulator Composite Film Using the LbL-assisted Composite Plating Method IEEE T. Magn. (IF 2.1) Pub Date : 2024-01-10 Naoyuki Fujita, Makoto Takeuchi, Yoshitaka Watanabe, Atsushi Yokoi, Wai Kian Tan, Masayuki Naoe, Hiroyuki Muto
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Efficient Reduced Magnetic Vector Potential Formulation for the Magnetic Field Simulation of Accelerator Magnets IEEE T. Magn. (IF 2.1) Pub Date : 2024-01-10 Laura A. M. D’Angelo, Dominik Moll, Andrea Vitrano, Nicolas Marsic, Erik Schnaubelt, Mariusz Wozniak, Herbert De Gersem, Bernhard Auchmann
The major advantage of reduced magnetic vector potential (RMVP) formulations is that complicated coil structures do not need to be resolved by a computational mesh. Instead, they are modeled by thin wires, whose source field is included into the simulation model along Biot–Savart’s law. Such an approach has already been successfully employed in ROXIE for the simulation of superconducting Large Hadron
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Enhanced Positional SECDED: Achieving Maximal Double-Error Correction in Racetrack Memories IEEE T. Magn. (IF 2.1) Pub Date : 2024-01-09 Hafiz Muhammad Abdullah, Ubaid Ullah Fayyaz, Tayyeb Mahmood, Seokin Hong
Racetrack memory (RM), a highly dense and high-speed spintronic non-volatile memory (NVM) technology, has the potential to revolutionize data storage. However, its reliability is often compromised by shift errors that occur during data transfer. To mitigate these errors, system architects often employ error-correcting codes (ECCs) such as single-error correction and double-error detection (SECDED)
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Effect of Particles Size on Eddy-Current Loss of Soft Magnetic Composites Using Combined DEM and FEM IEEE T. Magn. (IF 2.1) Pub Date : 2023-12-26 Kaimeng Shi, Dianhai Zhang, Ziyan Ren, Dezhi Chen, Yanli Zhang, Chang-Seop Koh
A method is proposed in this article to study the effect of particle size distribution on eddy-current loss from the microstructure model of soft magnetic composite (SMC). Unlike the previous ones, the microstructural model in this article is constructed based on the simulation data of the powder densification process. The simulation process uses the discrete element method (DEM), and the construction
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Analytical Approximations for Fitting Magnetic Coupling Coefficients Between Adjacent Coils IEEE T. Magn. (IF 2.1) Pub Date : 2023-12-18 Robert R. Hughes, Alexis Hernandez Arroyo, Anthony J. Mulholland
This article presents a simple yet novel 2-D modeling approach for approximating the coupling coefficient between neighboring inductors as a function of coplanar separation and relative angular displacement. The approach uses simple geometric arguments to predict the effective magnetic flux between inductors. Two extreme coil geometry regimes are considered: planar coils (i.e., on printed circuit board)
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Analytical Modeling and Optimization of PM Synchronous Machines Using Novel R262-TLBO Algorithm IEEE T. Magn. (IF 2.1) Pub Date : 2023-10-23 Jiyun Cheon, Seong Been Bae, Seun Guy Min
This article presents analytical modeling and optimization for permanent magnet (PM) synchronous machines using a novel algorithm named realistic 262-teaching-learning-based optimization (R262-TLBO). Through enhancing the convergence speed and searching capability, this study aims to uncover the most favorable compromise solutions that lie within the Pareto front, which can be utilized across a range
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Microstructure and Magnetic Properties of MM-Fe-B Magnets Prepared by Spark Plasma Sintering IEEE T. Magn. (IF 2.1) Pub Date : 2023-10-16 Yuanmin Zheng, Xianjun Hu, Renhui Liu, Qiulan Tan, Toujun Zhou, Heping Zhu, Yuehai Li, Minglong Zhong
High-density isotropic permanent magnet blocks were prepared using nanocrystalline rapidly quenched MM2.2Fe14B strip powder through spark plasma sintering (SPS) technology. This study investigated the impact of the sintering process on the phase composition, microstructure, and magnetic properties of MM-Fe-B SPS magnets. The results show that with the increase of sintering temperature, the porosity
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Fast Calculation Method of Bi-Direction Coupling Between Electromagnetic-Thermal Field for FSPM Motor IEEE T. Magn. (IF 2.1) Pub Date : 2023-10-10 Jingxia Wang, Ming Cheng, Wei Qin, Quanqiang Liu
This article aims to study the calculation method of the bi-direction coupling of electromagnetic (EM)-thermal field, focusing on the data transfer method between different types of mesh elements in different physical fields. First, a complete EM-thermal field bi-directional coupling analysis model is established, based on which the changing rule between the EM losses of different components of the
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An Energy Efficient In-Memory Computing Architecture Using Reconfigurable Magnetic Logic Circuits for Big Data Processing IEEE T. Magn. (IF 2.1) Pub Date : 2023-10-09 Milad Ashtari Gargari, Nima Eslami, Mohammad Hossein Moaiyeri
In-memory computing (IMC) is considered one of the most promising candidates to solve the nontraditional challenges conventional computing systems face in dealing with novel big data applications. This article proposes an efficient hybrid magnetic tunnel junction (MTJ)/FinFET base IMC architecture performing all basic Boolean logic operations (AND/NAND, OR/NOR, XOR/XNOR) in only one system clock. To
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The Role of Multiple Light Scattering in the Interpretation of Transmission Spectra of Magnetic Fluids With Magnetite Nanoparticles in the Visible and Near-IR Regions IEEE T. Magn. (IF 2.1) Pub Date : 2023-09-19 Constantine Yerin, Victoria Vivchar
The transmission spectra of magnetic fluids with magnetite nanoparticles in kerosene with a solid phase concentration from 0.01% to 15% in the range of 350–1050 nm have been studied. At a volume concentration of magnetite above 0.1%, a transmission maximum was found in the region of 730–750 nm. The maximum becomes more pronounced with an increase in the concentration of magnetite nanoparticles. The
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Improved Harmonic Model Method for Electrical Machine Magnetic Field Modeling IEEE T. Magn. (IF 2.1) Pub Date : 2023-09-19 Huang Zhang, Wei Wang, Kuizhi Lin, Jijie Deng, Zhiqiang Wang
The harmonic model (HM) method is widely applied for accurate linear/nonlinear magnetic field calculations; however, the harmonic truncation effect contributes to the error and slows down the convergence. The low-rank property of the coefficient factor matrix of the boundary conditions, moreover, results in an extremely time-consuming inverse matrix calculation. In this article we presented a simple
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A Contactless Inductive Position Sensor With Four-Phase Rotor for Angular Displacement Detection IEEE T. Magn. (IF 2.1) Pub Date : 2023-08-22 Dan-Ping Xu, Guochao Ma, Silong Fang, Fanlin Zeng, Sang-Moon Hwang
A new type of contactless inductive position sensor using the eddy current effect with four-phase rotor and high static accuracy applied to new energy vehicle was designed. The structure of magnetic field of the sensor was composed of a stator, a four-phase rotor, a group of excitation coils, and two sets of sinusoidal receiving coils. The working principle of how to use the eddy current effect to
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Quasi-3-D Analytical Method of Open-Circuit Magnetic Field for Yokeless and Segmented Armature Machine IEEE T. Magn. (IF 2.1) Pub Date : 2023-08-14 Feng Yi, Chi Zhang, Shuheng Qiu, Lijian Wu, Guiling Yang
This article presents an accurate and efficient quasi-3-D analytical method for the yokeless and segmented armature (YASA) axial flux permanent magnet (AFPM) machine. The proposed method takes into account the 3-D magnetic flux distribution, slotted effect, and end effect simultaneously. To facilitate the modeling of the YASA machine, the quasi-3-D method is utilized to transform it into a multislice
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Weak Magnetic Flux Leakage Detection and Numerical Method Under Inclined Pressure Conditions IEEE T. Magn. (IF 2.1) Pub Date : 2023-07-26 Shaoxuan Zhang, Jian Feng, Senxiang Lu, Xu Dong, Yu Yao
Weak magnetic flux leakage detection is a recently emerged and widely used stress detection technique for ferromagnetic materials. It has been used to analyze the stress in relation to the ferromagnetic material because of the change in the measurement signal near the inspected device caused by the stress. Weak magnetic flux leakage detection of ferromagnetic materials under normal stress [stress perpendicular
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Advanced Micromagnetic Modeling of Recording Heads IEEE T. Magn. (IF 2.1) Pub Date : 2023-07-28 Alexander V. Goncharov
An efficient algorithm is reported for the micromagnetic modeling of large-scale magnetic objects, such as magnetic recording heads. The numerical scheme for the solution of the Landau–Lifshitz–Gilbert (LLG) equation is a combination of the finite difference (FD), the finite element (FEM), and the fast Fourier transform (FFT) methods. The discretization of differential equation describing the magnetic
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SPICE-Based Compact Model for Voltage-Induced Magnetocapacitance in Magnetic Tunnel Junctions IEEE T. Magn. (IF 2.1) Pub Date : 2023-07-19 Jagadish Rajpoot, Ravneet Paul, Shivam Verma
Ensuring faster data processing and higher integration density while meeting the power budget is a challenging task as the world is moving toward next-generation computing. Therefore, researchers are looking for innovative ways to make computation more efficient. Magnetic tunnel junction (MTJ) devices have received enormous attention in recent years due to their non-volatility, low power consumption
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Dynamic Modeling of a Generator With Anisotropic Nonlinear Permanent Magnets in Finite Element Method Software IEEE T. Magn. (IF 2.1) Pub Date : 2023-07-19 Anar Ibrayeva, Sandra Eriksson
In this article, a method of dynamic modeling of nonlinear permanent magnets (PMs) with recoil lines in 2-D finite element analysis (FEA) software was presented. COMSOL Multiphysics 6.0 FEA software was used in this study. The method is implemented through the variable utilities. The simulation results of a spoke-type synchronous generator for a wind turbine with anisotropic aluminum–nickel–cobalt
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Enhancing Performance of Fluxgate Sensors Using Annealed Nanocrystalline Core IEEE T. Magn. (IF 2.1) Pub Date : 2023-07-17 Diana Hrakova, Pavel Ripka, Tomáš Kmječ
The magnetic core is one of the most important parts of a fluxgate sensor. This article presents a study of fluxgate sensors with a core based on nanocrystalline Fe73.5Cu1Nb3Si13.5B9 wire and compares their performance to that of sensors based on amorphous wire with a chemical composition of (Co94Fe6)75Si15B10. Both wires have a diameter of 0.12 mm and were manufactured by the Institute of Technical