IEEE Transactions on Magnetics最新文献_第2页

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IEEE Transactions on Magnetics Pub Date : 2025-08-27 DOI: 10.1109/TMAG.2025.3601453

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

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IEEE Transactions on Magnetics Pub Date : 2025-08-27 DOI: 10.1109/TMAG.2025.3597523

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IEEE Magnetics Society Information IEEE磁学学会信息

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IEEE Transactions on Magnetics Pub Date : 2025-08-27 DOI: 10.1109/TMAG.2025.3597521

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

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IEEE Transactions on Magnetics Pub Date : 2025-08-27 DOI: 10.1109/TMAG.2025.3597522

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A Modified Two-Phase Model to Address the Magnetization Reversal Mechanism and Angular Dependence of Coercivity in Conical Wire–Tube Heterostructures 一种改进的两相模型，用于解决锥形线管异质结构中磁化逆转机制和矫顽力角依赖性的问题

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-08-22 DOI: 10.1109/TMAG.2025.3601608

Akhila Priya Kotti;Amaresh Chandra Mishra

{"title":"A Modified Two-Phase Model to Address the Magnetization Reversal Mechanism and Angular Dependence of Coercivity in Conical Wire–Tube Heterostructures","authors":"Akhila Priya Kotti;Amaresh Chandra Mishra","doi":"10.1109/TMAG.2025.3601608","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3601608","url":null,"abstract":"Integrating different geometries into a single nanostructure paves the way to obtain magnetic properties available in both isolated geometries. Wire and tube nanostructures are among the most explored morphologies in the ferromagnetic cylindrical structure area. This work examines wire–tube heterostructures with the inclusion of bulged and tapered diameter modulations, which enhance the control over static magnetic properties. An extra step is observed in the hysteresis loops corresponding to the switching originated initially in the tube region, followed by the wire region. The pinning of the domain wall at the wire–tube interface can also be observed. Remanent states show that vortex domain walls can be nucleated at the ends along with the interface, depending on the radius and the type of modulation. The core region of the vortex configuration is shifted for low values of radius, resulting in a unique arrangement of spins just before reversal. Angular variation of coercivity dictates that the reversal mechanism follows propagation of domain walls along with rotation to initially switch the spins in the tube region and later in the wire region till a certain critical angle. Later, the entire wire–tube structure shows pseudocoherent rotation. A modified two-phase (MTP) model is formulated to fit the simulated data of angular coercivity below the critical angle. Above the critical angle, the Stoner–Wohlfarth (SW) model fits well with simulated data. It has been demonstrated that in the case of extremely tapered wire–tube structures, the critical angle is almost nonexistent, and the MTP model explains the reversal mechanism at all field inclinations.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 10","pages":"1-12"},"PeriodicalIF":1.9,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145141761","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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A 5T-2MTJ STT-Assisted Spin-Orbit-Torque-Based Ternary Content Addressable Memory for Hardware Accelerators 用于硬件加速器的5T-2MTJ stt辅助自旋-轨道-转矩三元内容可寻址存储器

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-08-21 DOI: 10.1109/TMAG.2025.3601525

Siri Narla;Piyush Kumar;Azad Naeemi

{"title":"A 5T-2MTJ STT-Assisted Spin-Orbit-Torque-Based Ternary Content Addressable Memory for Hardware Accelerators","authors":"Siri Narla;Piyush Kumar;Azad Naeemi","doi":"10.1109/TMAG.2025.3601525","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3601525","url":null,"abstract":"In this work, we present a novel non-volatile spin transfer torque (STT)-assisted spin–orbit torque (SOT)-based ternary content addressable memory (TCAM) with five transistors and two magnetic tunnel junctions (MTJs). We perform a comprehensive study of the proposed design from the device level to the application level. At the device level, various write characteristics such as the write error rate, time, and current have been obtained using micromagnetic simulations. The array-level search and write performance have been evaluated based on SPICE circuit simulations with layout extracted parasitics for bit-cells while also accounting for the impact of interconnect parasitics at the 7 nm technology node. A search error rate (SER) of <inline-formula> <tex-math>$3.9 times 10 {^{-}11 }$ </tex-math></inline-formula> is projected for exact search while accounting for various sources of variation in the design. In addition, the resolution of the search operation is quantified under various scenarios to understand the achievable quality of the approximate search operations. Application-level performance and accuracy of the proposed design have been evaluated and benchmarked against other state-of-the-art CAM designs in the context of a CAM-based recommendation system.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 10","pages":"1-9"},"PeriodicalIF":1.9,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145141728","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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Closed-Loop Spin Valve Current Sensor Based on Magnetic Shunt Effect for Range Extension 基于磁分流效应的闭环自旋阀电流传感器的增程研究

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-08-18 DOI: 10.1109/TMAG.2025.3599316

Jiaye Yu;Zhiqiang Wang;Tian Lan;Tianbin Xu;Yu Fu;Boyan Li;Tengda Yang;Ru Bai

{"title":"Closed-Loop Spin Valve Current Sensor Based on Magnetic Shunt Effect for Range Extension","authors":"Jiaye Yu;Zhiqiang Wang;Tian Lan;Tianbin Xu;Yu Fu;Boyan Li;Tengda Yang;Ru Bai","doi":"10.1109/TMAG.2025.3599316","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3599316","url":null,"abstract":"To address the wide-range and high-precision requirements of current sensors, this article proposes a design method for a current sensor based on the combination of magnetic shunt structure and closed-loop feedback technology. The system adopts a high-sensitivity spin valve chip to detect the magnetic field signal generated by the primary current. It utilizes the magnetic shunt effect of a soft magnetic ring to extend the detection range of the sensor. By integrating the signal processing techniques such as digital sampling, filtering, and signal feedback, the linearity, accuracy, and current measurement range of the sensor are enhanced. Using Ansys Maxwell 16.0, simulations and optimizations of the magnetic ring structure, magnetic shunt effect, and feedback coefficient are conducted. Simulation results show that the magnetic shunt effect can extend the current measurement range by about 20 times. The test results demonstrate that the sensor’s overall performance is excellent, with the sensitivity, linearity, and accuracy of 97 mV/A, 0.097%, and 0.324%, respectively. In addition, considering the uninterrupted power supply demand in practical applications, a detachable soft magnetic ring and a fixed structure are designed, enabling in situ current measurement. This design has potential applications in emerging energy fields such as electric vehicles and smart grids.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 10","pages":"1-9"},"PeriodicalIF":1.9,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145141753","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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Dynamic Hysteresis Model of Grain-Oriented Ferromagnetic Material Using Neural Operators 基于神经算子的晶粒取向铁磁材料动态迟滞模型

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-08-18 DOI: 10.1109/TMAG.2025.3600089

Ziqing Guo;Binh H. Nguyen;Hamed Hamzehbahmani;Ruth V. Sabariego

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Effect of Hardening on the Magnetic Behavior of AISI 1045 Steel 硬化对AISI 1045钢磁性能的影响

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-08-13 DOI: 10.1109/TMAG.2025.3598357

Mario Vukotić;Damijan Miljavec;Jaka Burja

{"title":"Effect of Hardening on the Magnetic Behavior of AISI 1045 Steel","authors":"Mario Vukotić;Damijan Miljavec;Jaka Burja","doi":"10.1109/TMAG.2025.3598357","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3598357","url":null,"abstract":"Hardening is an effective method to improve the hardness of the steel construction elements of an electric machine, such as rotor shaft. Surface hardening is typically employed for shafts as it provides a material with hard wear-resistant surface (martensite) and tough and ductile core (ferrite and pearlite), with the transitional zone between them (martensite, ferrite, and pearlite). The investigations were performed on the specimens of AISI 1045 steel, which is commonly used in electric machines. There were three categories of specimens, each of them representing a region in a surface hardened shaft – normalized specimens found in as-delivered steel (core), partially hardened specimens obtained by partial hardening of normalized specimens (transitional zone), and fully hardened specimens (hardened surface), also obtained from the normalized steel. The comparison of the magnetization curves showed that partially and fully hardened specimens exhibited a decrease of saturation magnetic flux density for about 11% and 7%, respectively, compared to the normalized specimens. The magnetizing curves from this study can be directly used in the magnetic simulations of a surface-hardened shaft. This allows more accurate electromagnetic design of electric machines, in which the shaft represents an important part of the magnetic circuit, e.g., two-pole wound-rotor synchronous machine.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 10","pages":"1-7"},"PeriodicalIF":1.9,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11124329","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145141726","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}

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Engineered Spin Configuration in Spin Valve With Customized Synthetic Antiferromagnetic Coupling and Perpendicular Magnetic Anisotropy 具有定制合成反铁磁耦合和垂直磁各向异性的自旋阀的工程自旋配置

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-08-12 DOI: 10.1109/TMAG.2025.3598105

Yongliang Han;Wei Su;Zhuoyue Liu;Lisong Wang;Zhongqiang Hu;Zhiguang Wang;Ming Liu

{"title":"Engineered Spin Configuration in Spin Valve With Customized Synthetic Antiferromagnetic Coupling and Perpendicular Magnetic Anisotropy","authors":"Yongliang Han;Wei Su;Zhuoyue Liu;Lisong Wang;Zhongqiang Hu;Zhiguang Wang;Ming Liu","doi":"10.1109/TMAG.2025.3598105","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3598105","url":null,"abstract":"Manipulation of the spin configuration in multilayer ferromagnetic thin films, especially for ones with synthetic antiferromagnetic (SAF) coupling, is of paramount importance for the construction of various spintronics. Here, perpendicular SAF heterostructures consisting of [Pt/Co]/Ru/[Co/Pt] have been developed. A large saturation field of 0.67 T has been observed, indicating a strong perpendicular antiferromagnetic (AFM) coupling. More importantly, we have fabricated a spin valve giant magnetoresistance (GMR) device based on SAF/Cu/NiFe multilayers. Transformation from in-plane magnetic anisotropy to perpendicular magnetic anisotropy (PMA) has been realized in the top NiFe layer by control of the Cu thickness and thus the interlayer coupling effect. The polarity of the SAF during the magnetization switching process could be customized by the control of the coupling type [ferromagnetic or antiferromagnetic (AFM)] between SAF and top NiFe layer or change of the periodicity of the Co/Pt multilayers. The spin configuration control strategy reported here provides new insights for the design of customized magnetic sensing, recording, and logic devices.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 10","pages":"1-6"},"PeriodicalIF":1.9,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145141724","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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