IEEE Transactions on Magnetics最新文献_第3页

Analysis of Magnetic Degradation and Kerf Surface for NO20 Non-Oriented Electrical Steel Subjected to Remote Laser Cutting 远程激光切割NO20无取向电工钢的磁退化及切口表面分析

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-08-11 DOI: 10.1109/TMAG.2025.3597390

Daniele De Gaetano;Alexei Winter;Lloyd Tinkler;Xiao Chen

{"title":"Analysis of Magnetic Degradation and Kerf Surface for NO20 Non-Oriented Electrical Steel Subjected to Remote Laser Cutting","authors":"Daniele De Gaetano;Alexei Winter;Lloyd Tinkler;Xiao Chen","doi":"10.1109/TMAG.2025.3597390","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3597390","url":null,"abstract":"This article investigates process parameters for remote laser cutting of non-grain-oriented (NGO) silicon iron electrical steel (NO20), targeting a precise and clean lamination surface, acceptable overall cutting time, and low degradation of magnetic properties. NO20 is commonly used in rotating electrical machines. Remote laser cutting offers a higher design flexibility with respect to traditional cutting methods such as punching, resulting in higher design freedom. However, incorrect laser settings can result in a strong degradation of material magnetic properties as well as burned lamination surfaces and inaccurate cut profiles. Optimal laser power and scan speed settings are identified by microscopy of partial cuts and by surface inspections of fully cut sample strips. In addition, the magnetic characterization of sample strips is carried out to identify the optimum idle time (IT) between scans. Finally, the optimum parameter set for remote laser cutting investigated within this study is compared against guillotine and electrical discharge machining (EDM) methods, and found to compare favorably in terms of cut quality and impact on magnetic properties.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 10","pages":"1-7"},"PeriodicalIF":1.9,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145141725","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}

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Symplectic Mixed Spectral Element Time-Domain Method for 3-D Schrödinger–Maxwell Equations With Generalized Coulomb Gauge 广义库仑规三维Schrödinger-Maxwell方程的辛混合谱元时域解法

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-08-08 DOI: 10.1109/TMAG.2025.3597135

Chengzhuo Zhao;Wenjie Tang;Kangshuai Du;Na Liu;Ruili Zhang;Qing Huo Liu

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Hybrid Switching of Perpendicular Magnetization in Assistance With In-Plane Uniaxial Shape Anisotropy 平面内单轴形状各向异性辅助下垂直磁化的混合开关

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-08-07 DOI: 10.1109/TMAG.2025.3596631

Heston A. Mendonca;Ashwin A. Tulapurkar

{"title":"Hybrid Switching of Perpendicular Magnetization in Assistance With In-Plane Uniaxial Shape Anisotropy","authors":"Heston A. Mendonca;Ashwin A. Tulapurkar","doi":"10.1109/TMAG.2025.3596631","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3596631","url":null,"abstract":"The spin–orbit torque (SOT) mechanism is a highly efficient method for switching the magnetization of magnetic tunnel junctions (MTJs) with perpendicular anisotropy. However, the need for an in-plane magnetic field for the deterministic switching of MTJs restricts their practical applications. Hence, a hybrid approach of the spin-transfer torque (STT) along with SOT is often employed. An alternate approach for field-free switching is to use an elliptical MTJ whose axis is tilted at a certain angle with that of a heavy metal. This method uses in-plane uniaxial shape anisotropy along with SOT for deterministic switching. Here, we study a five-terminal perpendicular magnetic anisotropy (PMA) MTJ having an elliptical cross section, switched using both the hybrid approach and the uniaxial shape anisotropy. The switching probability of this device is simulated using the Landau–Lifshitz–Gilbert (LLG) equation and compared to that of a three-terminal MTJ having a circular cross section. Our results show that the elliptical MTJ exhibits better switching probability than the circular MTJ. Additionally, we analyze key parameters that can enhance the switching probability of the elliptical MTJ.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 10","pages":"1-5"},"PeriodicalIF":1.9,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145141727","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}

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Electromagnetic Mechanism and Buffering Performance Analysis of Linear Tubular Electromagnetic Source Eddy Current Dampers 线性管状电磁源涡流阻尼器的电磁机理及缓冲性能分析

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-08-05 DOI: 10.1109/TMAG.2025.3595405

Wenbin Yang;Hongyi Zhang;Yiwen Cao;Zhengqing Chen;Xugang Hua;Huawei Niu;Shouying Li

{"title":"Electromagnetic Mechanism and Buffering Performance Analysis of Linear Tubular Electromagnetic Source Eddy Current Dampers","authors":"Wenbin Yang;Hongyi Zhang;Yiwen Cao;Zhengqing Chen;Xugang Hua;Huawei Niu;Shouying Li","doi":"10.1109/TMAG.2025.3595405","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3595405","url":null,"abstract":"This study derives a theoretical formula for calculating the damping force of the electromagnetic source eddy current damper (ES-ECD) based on the magnetic vector potential form of Maxwell’s equations and layer theory. The accuracy of the formula is validated through finite element modeling (FEM) and a static magnetic field test, with a maximum error of less than 3% in the damping force–velocity curve. A comparison with the permanent-magnet source eddy current damper (PS-ECD) reveals the electromagnetic evolution mechanism underlying the damping force–velocity relationship of the ES-ECD. The results indicate that the ES-ECD exhibits a lower critical velocity and enhanced nonlinearity in the damping force beyond the critical point, attributed to the intensified opposing magnetic field generated in the time-varying field. The axial pole-pitch ratio, <inline-formula> <tex-math>$alpha $ </tex-math></inline-formula>, significantly influences the nonlinear characteristics of the ES-ECD, with the damping force per unit ampere-turn reaching its maximum at <inline-formula> <tex-math>$alpha =0.65$ </tex-math></inline-formula>. The nonlinear characteristics of the ES-ECD make the damping coefficient more sensitive to variations in conductor thickness and air gap. At low velocities, the higher nonlinear damping coefficient broadens the optimal parameter range of traditional eddy current dampers (ECDs), offering enhanced versatility. Through numerical simulation of the dynamic response characteristics of the impact buffering system for the falling mass block, it has been verified that the ES-ECD can achieve up to a 20.6% improvement in buffering performance compared to the PS-ECD, effectively absorbing the system’s impact energy and achieving swift vibration attenuation.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 10","pages":"1-13"},"PeriodicalIF":1.9,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145141763","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

Research on No-Load Air-Gap Magnetic Field and Multi-Objective Optimization of a Three-Segment Halbach PMSLM With Partially Magnetized Poles 部分磁化磁极的三段Halbach永磁同步电机空载气隙磁场及多目标优化研究

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-30 DOI: 10.1109/TMAG.2025.3593828

Pin Lv;Ning Wang;Xunwen Su;Zehua Shang;Chenxi Zhang;Jinming Fu

{"title":"Research on No-Load Air-Gap Magnetic Field and Multi-Objective Optimization of a Three-Segment Halbach PMSLM With Partially Magnetized Poles","authors":"Pin Lv;Ning Wang;Xunwen Su;Zehua Shang;Chenxi Zhang;Jinming Fu","doi":"10.1109/TMAG.2025.3593828","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3593828","url":null,"abstract":"A three -segment Halbach permanent magnet synchronous linear motor with partially magnetized poles (PTH-PMSLM) is proposed to address the thrust ripple issue in permanent magnet synchronous linear motor (PMSLM). The proposed motor features a coreless mover structure, adopts a three-segment Halbach array for the permanent magnet arrangement, and uses convex iron poles to replace part of the main magnetic poles, which reduces leakage flux harmonics and increases magnetic flux density. Additionally, since different topologies affect the motor performance, a subdomain analytical model is established to systematically analyze the influence of key structural parameters on motor performance. To reduce computational effort and improve model accuracy, a Kriging multi-objective coati optimization algorithm (Kriging-MOCOA) model is used to optimize the magnetic pole structure, with average electromagnetic thrust, thrust ripple, thrust density, and no-load back electromotive force (EMF) as optimization targets. The Pareto front is obtained using the expected improvement (EI) infill criterion, and the optimal parameter combination is determined. It is demonstrated that the proposed motor exhibits lower thrust ripple and higher permanent magnet utilization, as validated by the developed analytical model and finite-element results. This design is suitable for high-precision machining equipment.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 9","pages":"1-14"},"PeriodicalIF":1.9,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909033","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}

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IEEE Transactions on Magnetics Institutional Listings 《IEEE磁学汇刊》

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-28 DOI: 10.1109/TMAG.2025.3589519

引用次数: 0

IEEE Magnetics Society Information IEEE磁学学会信息

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-28 DOI: 10.1109/TMAG.2025.3589517

引用次数: 0

IEEE Transactions on Magnetics Publication Information IEEE电磁学学报出版信息

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-28 DOI: 10.1109/TMAG.2025.3589518

引用次数: 0

Dual Mode Spin-to-Charge Conversion in Ta/NiFe/Ta/CoFeB/Ta Multilayer Thin Films With Varying Spacer Layer Thickness 不同间隔层厚度Ta/NiFe/Ta/CoFeB/Ta多层薄膜的双模自旋-电荷转换

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-25 DOI: 10.1109/TMAG.2025.3591246

Brahmaranjan Panigrahi;Rohiteswar Mondal;Chandrasekhar Murapaka;Arabinda Haldar

{"title":"Dual Mode Spin-to-Charge Conversion in Ta/NiFe/Ta/CoFeB/Ta Multilayer Thin Films With Varying Spacer Layer Thickness","authors":"Brahmaranjan Panigrahi;Rohiteswar Mondal;Chandrasekhar Murapaka;Arabinda Haldar","doi":"10.1109/TMAG.2025.3591246","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3591246","url":null,"abstract":"The generation of multimode ferromagnetic resonance (FMR) in a single device and its conversion to a voltage signal is a cornerstone for the efficient engineering of spintronics devices. In this study, we systematically investigated the effect of spacer layer thickness on engineering the dual resonance modes and spin-to-charge conversion (SCC) efficiency in Ta/NiFe/Ta(t)/CoFeB/Ta multilayer thin films. We observed a two-step magnetic hysteresis loop behavior associated with two magnetic layers. The extent of this step in hysteresis is strongly sensitive to the variation of spacer layer thickness. Spacer layer thickness played a crucial role in the coupling strength of the two ferromagnetic (FM) layers. Consequently, our FMR study revealed dual resonance modes where the separation between the modes is strongly dependent on the interlayer coupling strength. The lowest damping was observed as 0.006 (0.007) associated with the NiFe(CoFeB) layer for the Ta/NiFe/Ta(12)/CoFeB/Ta sample. The SCC measurements were carried out using the inverse spin Hall effect (ISHE) experiment. A detailed angular study was performed to extract the various contributions of spin rectification and spin pumping components. The spin pumping contribution was found to be prominent for all the samples, indicating an efficient SCC. A significant voltage drop was observed due to the NiFe layer compared to the CoFeB layer for all the samples. This comprehensive report offers a novel avenue for multiple SCCs in a single device associated with its customizable dual-mode FMR based on engineering different interfaces.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 9","pages":"1-8"},"PeriodicalIF":1.9,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909399","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

Analysis and Correction of Zero Stiffness Point Shift in Magnetic Levitation Gravity Compensator 磁悬浮重力补偿器零刚度点偏移的分析与修正

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-07-22 DOI: 10.1109/TMAG.2025.3591444

Kai Liu;Fuxiang Chen;Xinpeng Wei;Aoqi Hu;Yingtong Wu;Xiaoqing Li;Lizhan Zeng

{"title":"Analysis and Correction of Zero Stiffness Point Shift in Magnetic Levitation Gravity Compensator","authors":"Kai Liu;Fuxiang Chen;Xinpeng Wei;Aoqi Hu;Yingtong Wu;Xiaoqing Li;Lizhan Zeng","doi":"10.1109/TMAG.2025.3591444","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3591444","url":null,"abstract":"In the field of ultra-precision manufacturing, zero stiffness magnetic levitation gravity compensators (ZSMLGCs) are widely employed as passive vibration isolation devices to mitigate ground-induced disturbances. However, the asymmetry of the magnetic repulsive and attractive forces, induced by the relative permeability of the permanent magnets, results in a shift of the zero stiffness point away from the geometric center, significantly impairing isolation performance. This article proposes a novel ZSMLGC topology that addresses this issue. Both analytical and numerical models (NMs) are developed to evaluate magnetic force and stiffness characteristics, and a comprehensive comparison is conducted in terms of computational accuracy and efficiency. Based on the modeling results, a design method is introduced that effectively balances speed and accuracy while eliminating the zero stiffness point shift by optimizing the geometry of the compensating magnets. Simulation results demonstrate that the proposed design achieves zero stiffness point precisely at the geometric center, with vertical stiffness below 5 N/m within a ±2 mm stroke and a levitation force exceeding 20 N to compensate for the gravitational loads.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 9","pages":"1-13"},"PeriodicalIF":1.9,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144909035","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