IEEE Transactions on Magnetics最新文献_第3页

Multi-Physics Field Coupling Modeling and Thermal Distribution Analysis of Underwater Rotary Magnetic Coupling Mechanism 水下旋转磁耦合机构多物理场耦合建模及热分布分析

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-02-26 DOI: 10.1109/TMAG.2025.3545775

Zhiyuan Cheng;Tianrui Ji;Anglin Li;Dariusz Kacprzak;Aiguo Patrick Hu

{"title":"Multi-Physics Field Coupling Modeling and Thermal Distribution Analysis of Underwater Rotary Magnetic Coupling Mechanism","authors":"Zhiyuan Cheng;Tianrui Ji;Anglin Li;Dariusz Kacprzak;Aiguo Patrick Hu","doi":"10.1109/TMAG.2025.3545775","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3545775","url":null,"abstract":"The underwater wireless power transfer (WPT) technology provides an effective solution to underwater energy transfer without direct electric contact, and the underwater electromagnetic coupler (UEC) of the WPT system is a critical component in realizing the technology. This article introduces a novel secondary rotary banner UEC structure that meets the high efficiency and reliability requirements for wireless charging of autonomous underwater vehicles (AUVs), while providing the benefits, such as low-temperature rise, easy charging alignment, lightweight design, and strong offset resistance. Based on the strong relationship between the UEC’s temperature rise and the reliability of the underwater WPT system, electromagnetic-thermal-fluid multi-physics coupling simulation models are established for three secondary rotary UECs to compare different secondary-side structures, effectively addressing the challenges of estimating the temperature distribution related to uneven power losses. To further realize accurate calculation of the thermal distribution, the effects of seawater eddies, seawater heat exchange, and the shell are considered. The simulation and experimental results show that the comprehensive performance index of the secondary full-banner UEC is superior, and the temperature rise distribution of the established physical model can be used to accurately predict the actual situation. The maximum error between simulation and practical measurement is 2.45%, which verifies these models, and provides a theoretical basis for improved heat dissipation design of the UEC.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 4","pages":"1-10"},"PeriodicalIF":2.1,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706825","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

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 : 2025-02-26 DOI: 10.1109/TMAG.2025.3542945

引用次数: 0

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 : 2025-02-26 DOI: 10.1109/TMAG.2025.3542947

引用次数: 0

Analytical Model of Consequent-Pole Flux Reversal Machine With Segmented Magnet Arrangement 分段磁体布置的结果极磁通反转电机解析模型

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-02-25 DOI: 10.1109/TMAG.2025.3545056

Youyuan Ni;Pei Wang;Benxian Xiao;Yong Lin;Qunjing Wang

引用次数: 0

Analysis of Loss Mechanisms Due to Eddy Currents and Hysteresis in Two-Phase Amorphous Hybrid Soft Magnetic Composites 两相非晶杂化软磁复合材料涡流和磁滞损耗机理分析

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-02-25 DOI: 10.1109/TMAG.2025.3545294

Wangchang Li;Jianmin Zhang;Mengxing Li;Yao Ying;Jing Yu;Jingwu Zheng;Liang Qiao;Juan Li;Shenglei Che

{"title":"Analysis of Loss Mechanisms Due to Eddy Currents and Hysteresis in Two-Phase Amorphous Hybrid Soft Magnetic Composites","authors":"Wangchang Li;Jianmin Zhang;Mengxing Li;Yao Ying;Jing Yu;Jingwu Zheng;Liang Qiao;Juan Li;Shenglei Che","doi":"10.1109/TMAG.2025.3545294","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3545294","url":null,"abstract":"In this study, the effects of the mass ratio between two magnetic phases and particle size on the density, effective permeability, and particularly on eddy current losses and hysteresis losses in hybrid soft magnetic composites (HSMCs). It was found that adding an appropriate amount of powder with specific particle sizes can effectively increase sample density, while the permeability variation in HSMCs shows strong dependence on density. The simulation and calculation model considers the random distribution of particles with different grain sizes and the skin effect was established to separate the contributions of eddy current losses and hysteresis losses of different magnetic phases within the HSMCs. The variation of power losses in HSMCs results from the combined effect of magnetic phase mass ratio, material conductivity, relative permeability, hysteresis properties, and particle size distribution. These results provide insights into fabricating high permeability and low-loss power electronic devices for high-frequency applications.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 4","pages":"1-7"},"PeriodicalIF":2.1,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706723","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

Spin Valve Sensor With Integrated On-Chip Longitudinal Permanent Magnet Biasing for Linear Sensing Applications 自旋阀传感器集成片上纵向永磁偏置线性传感应用

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-02-24 DOI: 10.1109/TMAG.2025.3544762

Tejaswini C. Gawade;C. T. Gopika;Umesh P. Borole;K. P. Prajisha;Apoorva Kaul;Jakeer Khan;P. Chowdhury;Bhagaban Behera

{"title":"Spin Valve Sensor With Integrated On-Chip Longitudinal Permanent Magnet Biasing for Linear Sensing Applications","authors":"Tejaswini C. Gawade;C. T. Gopika;Umesh P. Borole;K. P. Prajisha;Apoorva Kaul;Jakeer Khan;P. Chowdhury;Bhagaban Behera","doi":"10.1109/TMAG.2025.3544762","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3544762","url":null,"abstract":"This study focuses on fabricating spin-valve giant magnetoresistance (SV-GMR) sensors integrated with longitudinal permanent magnet (PM) biasing, resulting in a linearized field response with reduced hysteresis. For this, CoCrPt thick films were sputter-deposited under optimized conditions to achieve the highest <inline-formula> <tex-math>$H_{c}$ </tex-math></inline-formula> value of the order of 1600 Oe with a higher squareness ratio. Detailed finite element modeling (FEM) confirmed that the biasing field less than 40 Oe can be produced by PM with a thickness of <inline-formula> <tex-math>$1~mu $ </tex-math></inline-formula> m across the sensing elements with a gap of <inline-formula> <tex-math>$90~mu $ </tex-math></inline-formula> m. The SV-GMR sensors are patterned into resistors of on-chip push-pull Wheatstone bridge assembly and biased with PM to reduce coercivity with improved linearity. Furthermore, the device’s performance was evaluated across a broader temperature spectrum, revealing notable thermal stability within −40 °C to 125 °C. These findings highlight the sensor’s reliability and precision linear field sensing applications, specifically for low current measurements.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 4","pages":"1-6"},"PeriodicalIF":2.1,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706593","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

Four-Channel Asymmetric Retroreflection via a Passive Non-Hermitian Metasurface 被动非厄米超表面的四通道非对称反反射

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-02-24 DOI: 10.1109/TMAG.2025.3544653

Chongpu Guo;Jiaran Qi

{"title":"Four-Channel Asymmetric Retroreflection via a Passive Non-Hermitian Metasurface","authors":"Chongpu Guo;Jiaran Qi","doi":"10.1109/TMAG.2025.3544653","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3544653","url":null,"abstract":"Exceptional points (EPs) in non-Hermitian systems possess increased sensitivity and counterintuitive physical properties, thus offering a wide range of potential applications. Here, a passive non-Hermitian metasurface with four-channel asymmetric retroreflection at microwave region is proposed. Noninterleaved birefringent elements featuring adjustable losses are employed to encode dual independent phase gradients for incident waves along orthogonal planes. By introducing localized loss, the phase-gradient metasurface operates at two distinct second-order EPs and demonstrates markedly asymmetric retroreflection across two orthogonal planes. Specifically, the right-side port mode exhibits strong retroreflection, whereas the left-side port mode is nearly completely suppressed. As a proof of concept, the far-field scattering intensities of the prototype are demonstrated, which exhibits the extremely asymmetric performance across four channels. Our research opens new avenues for realize multifunctional performance of metasurfaces by exploring the new degree of freedom of loss and the multichannel asymmetric retroreflection performance has promising applications in establishing asymmetric channels in wireless communications and controlling radar cross section.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 4","pages":"1-6"},"PeriodicalIF":2.1,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706831","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

Effects of Fe, Cu, and Zr Substitutions on Microstructure of SmCo/Fe(Co) Nanocomposite Magnets Fe、Cu和Zr取代对SmCo/Fe（Co）纳米复合磁体微观结构的影响

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-02-24 DOI: 10.1109/TMAG.2025.3544630

Jieqiong Gao;Tiancong Li;Xiaohong Li;Li Lou;Yingxin Hua;Jinyi Wang;Yiran Li;Wenyue Qin;Defeng Guo

{"title":"Effects of Fe, Cu, and Zr Substitutions on Microstructure of SmCo/Fe(Co) Nanocomposite Magnets","authors":"Jieqiong Gao;Tiancong Li;Xiaohong Li;Li Lou;Yingxin Hua;Jinyi Wang;Yiran Li;Wenyue Qin;Defeng Guo","doi":"10.1109/TMAG.2025.3544630","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3544630","url":null,"abstract":"The substitution of alloy elements is an effective method to tailor the phase composition and microstructure of nanocomposite magnets. Here, a good microstructure, i.e., high soft phase content (~28.5 wt.%), small soft phase grain size (~10 nm), and uniform distribution of soft magnetic phase grains, was successfully realized in a SmCo/Fe(Co) nanocomposite magnet through the simultaneous substitution of Fe, Cu, and Zr alloy elements. The influences of alloy element substitutions on phase composition and microstructure of SmCo nanocomposite magnets have been studied. The substitution of Fe element increases the content of soft magnetic phase. The substitution of Cu element promotes the crystallization degree of hard magnetic phase at low temperature. The substitution of Zr element reduces the grain size of the soft magnetic phase Fe(Co). The simultaneous substitution of the three elements stabilizes the existence of SmCo3 phase, which greatly improves the <inline-formula> <tex-math>$H_{mathrm {c}}$ </tex-math></inline-formula> of the sample. The optimized magnetic energy product was obtained at 580 °C when the contents of the Fe, Cu, and Zr were 14, 4, and 3 wt.%, respectively.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 4","pages":"1-8"},"PeriodicalIF":2.1,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706724","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

Magnetic Viscosity Characterization of Fe–Nd–B Permanent Magnets Using a Novel Measurement Approach 一种新型测量方法表征Fe-Nd-B永磁体的磁性粘度

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-02-24 DOI: 10.1109/TMAG.2025.3544856

M. Lanz;G. Martinek;T. Kresse;G. Schneider;D. Goll

引用次数: 0

Power Attack-Immune Spintronic-Based AES Hardware Accelerator for Secure and High-Performance PiM Architectures 用于安全和高性能PiM架构的基于自旋电子学的功率攻击免疫AES硬件加速器

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-02-21 DOI: 10.1109/TMAG.2025.3544409

Pegah Iranfar;Abdolah Amirany;Mohammad Hossein Moaiyeri

{"title":"Power Attack-Immune Spintronic-Based AES Hardware Accelerator for Secure and High-Performance PiM Architectures","authors":"Pegah Iranfar;Abdolah Amirany;Mohammad Hossein Moaiyeri","doi":"10.1109/TMAG.2025.3544409","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3544409","url":null,"abstract":"Concerns about data security have grown due to the increasing leakage power attributed to the scaling of CMOS technology. This necessitates the integration of spintronic devices, such as magnetic tunnel junctions (MTJs), with CMOS to mitigate leakage power and maintain data integrity. This article proposes a novel hybrid MTJ/CMOS architecture that implements the advanced encryption standard (AES) algorithm within a process-in-memory (PiM) framework to enhance data security. The key innovation is the architecture’s resilience to side-channel attacks, including differential power analysis (DPA) and correlation power analysis (CPA). Comprehensive post-layout simulations using the well-established 40-nm CMOS technology demonstrate that the power consumption patterns of each AES component remain constant, even under process variations. Furthermore, system-level simulations highlight that the proposed AES-128 architecture effectively resists information leakage and power attacks, even when exposed to numerous power traces used for key extraction. Comparative results indicate that our proposed power attack-resilient AES-128 hardware design outperforms existing application-specific integrated circuit (ASIC) and field-programmable gate array (FPGA) implementations, enhancing static power by 98% and boosting maximum frequency by 72% and 91%, respectively. The architecture’s adaptability for implementing other AES versions (AES-192 and AES-256) and substitution-based encryption algorithms further expands its versatility.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 4","pages":"1-12"},"PeriodicalIF":2.1,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143706829","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