IEEE Transactions on Magnetics最新文献_第4页

Magnetostatic and Magnetodynamic Modeling With Unsupervised Physics-Informed Neural Networks 无监督物理信息神经网络的静磁和磁动力学建模

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-18 DOI: 10.1109/TMAG.2025.3590627

Sina Toghranegar;Hussain Kazmi;Geert Deconinck;Ruth V. Sabariego

{"title":"Magnetostatic and Magnetodynamic Modeling With Unsupervised Physics-Informed Neural Networks","authors":"Sina Toghranegar;Hussain Kazmi;Geert Deconinck;Ruth V. Sabariego","doi":"10.1109/TMAG.2025.3590627","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3590627","url":null,"abstract":"Physics-informed neural networks (PINNs) have emerged as a promising approach for solving magnetic field problems by directly embedding governing equations and boundary conditions into the learning process, thus eliminating the need for extensive labeled training data. This study explores the application of unsupervised PINNs to magnetostatic and magnetodynamic simulations, with a particular emphasis on material interfaces. The proposed framework utilizes separate PINNs for distinct material regions, coupled through interface loss terms to ensure field continuity. In addition, Fourier feature mapping is employed to enhance the ability of PINNs to capture high-frequency variations in the solution. The results are validated against finite element method simulations, demonstrating acceptable agreement while highlighting challenges in accurately modeling sharp field discontinuities. The findings underscore the potential of PINNs as a flexible, physics-driven approach for magnetostatic and magnetodynamic modeling. Three test cases are examined: 1) a 2-D magnetostatic inductor; 2) magnetostatic concentric disks with nonlinear material properties; and 3) a time-domain simulation of concentric disks incorporating eddy currents and nonlinear material behavior.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 9","pages":"1-10"},"PeriodicalIF":1.9,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Low-Power 8-bit Spintronic Rotary Encoder With Single-Track Gray Code Based on Spin-Hall Effect-Driven Domain Wall Motion 基于自旋霍尔效应驱动的域壁运动的低功耗8位自旋电子单轨灰码旋转编码器

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-17 DOI: 10.1109/TMAG.2025.3590061

S. Q. Yan;S. Liu;J. J. Wang;Y. H. Liu;Y. A. Liu;X. Y. Zhang;Q. Yu;T. P. Chen;Y. Liu

引用次数: 0

Design and Characterization of a Multicore Residence Times Difference (RTD) Fluxgate Magnetometer Based on Composite Amorphous Wire Arrays 基于复合非晶线阵列的多芯驻留时差磁通门磁强计的设计与表征

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-15 DOI: 10.1109/TMAG.2025.3588886

Mingyu Li;Qianzhen Su;Long Wang;Junkai Wang;Hao Zhang;Zepeng Wang;Bo Zhang;Xiaolong Wen;Jianhua Li

引用次数: 0

A Model Prediction Method for the Electromagnetic Force of an Axial Flux Eddy Current Brake Based on the ISSA Algorithm 基于ISSA算法的轴向磁通涡流制动器电磁力模型预测

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-15 DOI: 10.1109/TMAG.2025.3589185

Xinhang Li;Xiaofei Zhai;Fan Yang;Linlong Chen

{"title":"A Model Prediction Method for the Electromagnetic Force of an Axial Flux Eddy Current Brake Based on the ISSA Algorithm","authors":"Xinhang Li;Xiaofei Zhai;Fan Yang;Linlong Chen","doi":"10.1109/TMAG.2025.3589185","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3589185","url":null,"abstract":"Solving an accurate electromagnetic force calculation model is crucial for establishing a dynamic digital simulation model of the entire system of an axial flux eddy current brake (ECB). However, the electromagnetic force accuracy of the 2-D analytical model is relatively low, while the 3-D analytical model is difficult to solve directly. To address this issue, this article proposes a method for predicting the electromagnetic force of the axial ECB using the improved sparrow search algorithm (ISSA). First, by deriving the 2-D analytical model, the fundamental function characteristics of the electromagnetic force model are extracted, and a prediction model for the electromagnetic force with unknown parameters is established. Next, discrete data points from the 3-D finite element model (FEM) simulation are used as observation values. The proposed ISSA, which integrates genetic algorithms (GAs), cosine-sine search strategies, and t-distribution-based perturbation strategies, is applied to optimize the calculation with the sum of squared errors (SSEs) as the objective function, solving for the unknown parameters in the prediction model, and thereby establishing prediction models for electromagnetic torque and axial force. Experimental validation shows that the mean relative error (MRE) between the predicted and experimental values is within 3%, demonstrating the effectiveness of this method.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 9","pages":"1-14"},"PeriodicalIF":1.9,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-Vertex Engineering of Domain Wall Motion in Artificial Spin Ice 人工自旋冰中畴壁运动的单顶点工程

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-14 DOI: 10.1109/TMAG.2025.3589081

Charu Singh;Neeti Keswani;Nirat Ray

引用次数: 0

A Phenomenological Approach for Understanding the High Magnetic Coercivity State of a Fe–O Nanocrystalline Press Compact 用现象学方法理解铁-氧纳米晶压片的高矫顽力状态

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-14 DOI: 10.1109/TMAG.2025.3587795

J. Kargin;A. S. Lileev;Y. V. Konyukhov;D. G. Zhukov;H. Sanchez Cornejo;Ji Won Seo;S. N. Holmes;J. Albino Aguiar;C. H. W. Barnes;L. De Los Santos Valladares

{"title":"A Phenomenological Approach for Understanding the High Magnetic Coercivity State of a Fe–O Nanocrystalline Press Compact","authors":"J. Kargin;A. S. Lileev;Y. V. Konyukhov;D. G. Zhukov;H. Sanchez Cornejo;Ji Won Seo;S. N. Holmes;J. Albino Aguiar;C. H. W. Barnes;L. De Los Santos Valladares","doi":"10.1109/TMAG.2025.3587795","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3587795","url":null,"abstract":"Experimentally obtained magnetic signals for a Fe–O nanocrystalline press compact were fitted using a phenomenological approach. This method considers the individual properties of microvolumes and their statistics. It also helps avoiding complex calculations while focusing on local fundamental magnetic characteristics without considering internal processes. Currently, the precise estimation of internal processes in local areas is nearly impossible. They depend on fluctuations in the anisotropy field, texture degree, and phase ratio. A cubic compact (<inline-formula> <tex-math>$10^{3}$ </tex-math></inline-formula> mm3 volume) was fabricated by pressing magnetite particles mixed with 20% iron by weight in a high-energy milling machine. After characterizing the compacts by X-ray diffraction (XRD), their magnetic signals were measured to obtain the saturation magnetization (<inline-formula> <tex-math>$M_{text {s}} =0.97$ </tex-math></inline-formula> T), residual magnetization (<inline-formula> <tex-math>$M_{text {r}} =0.456$ </tex-math></inline-formula> T), and coercivity (<inline-formula> <tex-math>$H_{text {c}} =0.685$ </tex-math></inline-formula> kOe). The results suggest that the particle anisotropy fields relate to the effective anisotropy constants from the interaction between iron and magnetite particles. It is also found that single domains formed by iron particles contribute to high coercive states. This confirms that increasing the degree of texture results in an increment of the relative remanence and coercivity.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 9","pages":"1-10"},"PeriodicalIF":1.9,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11079774","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of Multiphase Single-Sided Linear Induction Motors for Combined Propulsion and Levitation of Maglev Vehicles 磁悬浮车辆联合推进与悬浮用多相单面直线感应电机分析

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-10 DOI: 10.1109/TMAG.2025.3587391

Simone Rametti;Lucien Pierrejean;André Hodder;Mario Paolone

{"title":"Analysis of Multiphase Single-Sided Linear Induction Motors for Combined Propulsion and Levitation of Maglev Vehicles","authors":"Simone Rametti;Lucien Pierrejean;André Hodder;Mario Paolone","doi":"10.1109/TMAG.2025.3587391","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3587391","url":null,"abstract":"Thanks to the rapid growth of multiphase drives (MPDs), multiphase (MP) rotating electrical machines have gained popularity in the scientific community, demonstrating several advantages compared to traditional three-phase ones. Although MP rotating machines have been extensively studied in the literature, little research has been carried out on MP linear electrical machines and their application in the transportation sector. In this context, this article proposes a highly accurate and computationally efficient analytical model of MP single-sided linear induction motors (SLIMs) validated through comparison with finite-element analysis (FEA) simulations over a large interval of operational speeds (i.e., <inline-formula> <tex-math>$0~{mathrm { m}} cdot {mathrm { s}}^{-1} leq v_{m} lt 150~{mathrm { m}} cdot {mathrm { s}}^{-1}$ </tex-math></inline-formula>). The proposed model, obtained by extending the one published in previous works by the authors, is used to analyze the performance of different MP SLIMs in terms of forces (i.e., thrust and normal force) and efficiency. A comparison with a three-phase SLIM is presented too. Furthermore, the effect of an iron appendix installed at the rear of the motor, which has been shown to increase the levitation force of SLIMs at high speed, has been added to the presented analysis. The results of the analysis demonstrate that an MP supply greatly affects the forces developed by the SLIMs and represents a solution to integrate propulsion and levitation (PL) functionalities into a single LIM for magnetic levitation (maglev) vehicles.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 9","pages":"1-10"},"PeriodicalIF":1.9,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanoscale Magnetic Tunnel Junctions Fabricated Using Etching-Back Technique 用蚀刻背切技术制备纳米磁性隧道结

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-04 DOI: 10.1109/TMAG.2025.3585890

Yawen Luo;Shuhui Liu;Renjuan Luo;Wei Tang;Bin Fang;Zhongming Zeng;Yan Zhou

{"title":"Nanoscale Magnetic Tunnel Junctions Fabricated Using Etching-Back Technique","authors":"Yawen Luo;Shuhui Liu;Renjuan Luo;Wei Tang;Bin Fang;Zhongming Zeng;Yan Zhou","doi":"10.1109/TMAG.2025.3585890","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3585890","url":null,"abstract":"Magnetic tunnel junctions (MTJs) have gained significant attention due to their versatile applications in next-generation information storage, high-sensitivity sensors, and neuromorphic computing systems. The precise and high-quality fabrication of MTJ devices in laboratory settings is crucial for driving advancements in MTJ research. This study introduces a high-precision, cost-effective, and efficient fabrication method for nanoscale MTJ devices by integrating metal hard mask etching (etch-back) with conventional lithography techniques. This approach enables the production of devices with nanopillar dimensions as small as 100 nm, achieving a remarkable 100% yield. The fabricated devices demonstrate outstanding performance metrics, including a resistance–area (RA) product of <inline-formula> <tex-math>$23~Omega cdot mu $ </tex-math></inline-formula>m2, a tunneling magnetoresistance (TMR) ratio of 110%, reliable spin-transfer torque (STT)-induced switching behavior, and a robust spin-torque diode effect. This work offers a practical and scalable pathway for the cost-effective laboratory fabrication of nanoscale MTJ devices, paving the way for further advancements in spintronic technologies.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 9","pages":"1-5"},"PeriodicalIF":1.9,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Methods to Compute Magnetic Flux Linkages Along H-Based Finite Element Formulations 基于h基有限元公式的磁通连杆计算方法

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-03 DOI: 10.1109/TMAG.2025.3585725

Lukas Daniel Domenig;Klaus Roppert;Herbert De Gersem;Manfred Kaltenbacher

引用次数: 0

Design and Optimization of Remagnetization Actuators 再磁化执行器的设计与优化

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-02 DOI: 10.1109/TMAG.2025.3585420

Claas Ehmke;Quentin Boehler;Salvador Pané;Bradley J. Nelson

引用次数: 0