IEEE Magnetics Letters最新文献_第10页

A Technological Approach for Miniaturization of Three-Dimensional Inductive Levitation Microsuspensions 三维诱导悬浮微悬浮液小型化的技术途径

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2022-03-11 DOI: 10.1109/LMAG.2022.3174522

Emil R. Mamleyev;Achim Voigt;Ali Moazenzadeh;Jan G. Korvink;Manfred Kohl;Kirill Poletkin

{"title":"A Technological Approach for Miniaturization of Three-Dimensional Inductive Levitation Microsuspensions","authors":"Emil R. Mamleyev;Achim Voigt;Ali Moazenzadeh;Jan G. Korvink;Manfred Kohl;Kirill Poletkin","doi":"10.1109/LMAG.2022.3174522","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3174522","url":null,"abstract":"In this letter, we report on a technological approach for miniaturization of a inductive levitating microsuspension based on nested three-dimensional (3-D) microcoil structures. In the developed approach, each 3-D microcoil is fabricated separately, beginning with the innermost and thus the smallest coil diameter of the nested microstructure. This helps to overcome fabrication restrictions due to the wire-bonding process and is primarily caused by the size of the bond-head and provides the opportunity to fabricate smaller nested 3-D microcoil structures. We fabricated a nested two-microcoil structure, the inner coil having a diameter of 1000 \u0000<inline-formula><tex-math>$mu$</tex-math></inline-formula>\u0000m and 14 windings, the outer coil with a diameter of 1900 \u0000<inline-formula><tex-math>$mu$</tex-math></inline-formula>\u0000m and eight windings, and demonstrated its application as an inductive levitating microsuspension. In particular, a fabricated 3-D inductive levitating microsuspension was able to levitate a 1100 \u0000<inline-formula><tex-math>$mu$</tex-math></inline-formula>\u0000m diameter disc-shaped proof mass at a height up to 45 \u0000<inline-formula><tex-math>$mu$</tex-math></inline-formula>\u0000m.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"13 ","pages":"1-4"},"PeriodicalIF":1.2,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/5165412/9656771/09772963.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Micromagnetic Simulation of Nitrogenation Effect on the Magnetic Properties of Sm2Fe17N3 Alloy 氮化作用对Sm2Fe17N3合金磁性能影响的微磁模拟

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2022-03-11 DOI: 10.1109/LMAG.2022.3158542

Zhi Yang;Yuanyuan Chen;Yuqing Li;Dongtao Zhang;Weiqiang Liu;Qingmei Lu;Qiong Wu;Hongguo Zhang;Ming Yue

{"title":"Micromagnetic Simulation of Nitrogenation Effect on the Magnetic Properties of Sm2Fe17N3 Alloy","authors":"Zhi Yang;Yuanyuan Chen;Yuqing Li;Dongtao Zhang;Weiqiang Liu;Qingmei Lu;Qiong Wu;Hongguo Zhang;Ming Yue","doi":"10.1109/LMAG.2022.3158542","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3158542","url":null,"abstract":"Nitrogenation is an indispensable process for the formation of Sm\u00002\u0000Fe\u000017\u0000N\u00003\u0000 and has a major influence on its magnetic properties. In this work, the effect of nitrogenation on the magnetic properties of Sm\u00002\u0000Fe\u000017\u0000N\u00003\u0000 was investigated by micromagnetic simulation. The normal coercivity, remanence, and the maximum energy product of incompletely nitrided Sm\u00002\u0000Fe\u000017\u0000N\u00003\u0000 with a nonnitrided Sm\u00002\u0000Fe\u000017\u0000 core size less than 16 nm approach nearly 99% of their values in fully nitrided Sm\u00002\u0000Fe\u000017\u0000N\u00003\u0000. Thus, a small nonnitrided Sm\u00002\u0000Fe\u000017\u0000 core does not affect the effective utilization of Sm\u00002\u0000Fe\u000017\u0000N\u00003\u0000 permanent magnets. The magnetization reversal mode of incompletely nitrided Sm\u00002\u0000Fe\u000017\u0000N\u00003\u0000 with different sizes of nonnitrided Sm\u00002\u0000Fe\u000017\u0000 cores was evaluated, providing an in-depth fundamental understanding of the demagnetization processes in Sm\u00002\u0000Fe\u000017\u0000N\u00003\u0000 particles. This work could be useful for optimizing nitrogenation conditions to improve the magnetic properties of Sm\u00002\u0000Fe\u000017\u0000N\u00003\u0000 permanent magnets.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"13 ","pages":"1-5"},"PeriodicalIF":1.2,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Combined Attitude Determination for Real-Time Geomagnetic Navigation 实时地磁导航的组合姿态确定

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2022-03-07 DOI: 10.1109/LMAG.2022.3156857

Weilin Wang;Zhaonan Jin;Linliang Miao;Zhihao Yang;Sasa Mi;Yijie Qin;Xingzhong Yao;Jun Ou-Yang;Xiaofei Yang

引用次数: 0

Measurement System for Characterization of Ferromagnetic Cores Under Controlled Magnetic Field Waveform 可控磁场波形下铁磁芯特性的测量系统

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2022-02-28 DOI: 10.1109/LMAG.2022.3155107

Branko M. Koprivica;Milan V. Plazinić

引用次数: 1

Gaussian Random Number Generator With Reconfigurable Mean and Variance Using Stochastic Magnetic Tunnel Junctions 基于随机磁隧道结的均值和方差可重构高斯随机数发生器

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2022-02-23 DOI: 10.1109/LMAG.2022.3152991

Punyashloka Debashis;Hai Li;Dmitri Nikonov;Ian Young

引用次数: 1

Magnetic Field Leakage Cancellation in Multiple-Input Multiple-Output Wireless Power Transfer Systems 多输入多输出无线电力传输系统中的磁场泄漏消除

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2022-02-14 DOI: 10.1109/LMAG.2022.3151065

Daisuke Kobuchi;Kentaro Matsuura;Yoshiaki Narusue;Hiroyuki Morikawa

引用次数: 1

Magnetic Full Adder Based on Negative Differential Resistance-Enhanced Anomalous Hall Effect 基于负微分电阻增强反常霍尔效应的磁性全加器

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2022-01-27 DOI: 10.1109/LMAG.2022.3146132

Ziyao Lu;Hongming Mou;Yuchen Pu;Yan Wen;Xixiang Zhang;Xiaozhong Zhang

{"title":"Magnetic Full Adder Based on Negative Differential Resistance-Enhanced Anomalous Hall Effect","authors":"Ziyao Lu;Hongming Mou;Yuchen Pu;Yan Wen;Xixiang Zhang;Xiaozhong Zhang","doi":"10.1109/LMAG.2022.3146132","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3146132","url":null,"abstract":"Spintronic logic devices have attracted attention because of the prospect of breaking the von Neumann bottleneck through nonvolatile in-memory computing. Although varieties of spin Boolean logic gates have been proposed, spintronic arithmetic logic units such as adders have not been extensively studied because of the difficulties in application of the cascade method of CMOS-based logic in spintronic devices. We experimentally demonstrated a spintronic full adder based on the anomalous Hall effect and geometrical tuning magnetization switching driven by spin-orbit torque. The anomalous Hall effect of magnetic bits was enhanced by nonlinear elements with N-type negative differential resistance to control the \u0000<sc>on/off\u0000 state of \u0000<sc>mosfet\u0000s, which determined the write voltage of the memory unit. The magnetizations of the memory bits in the memory unit were switched one by one as write voltage increased because of geometry difference. The order of magnetization switching caused the response of the anomalous Hall voltage of the memory unit to the input configurations to conform with the logic function of the full adder. The computation function of the full adder combined with memory writing was experimentally realized with only seven magnetic bits and two steps. The reduced number of magnetic bits and time steps indicated the efficiency of space and time of our device, which is beneficial for practical applications.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"13 ","pages":"1-5"},"PeriodicalIF":1.2,"publicationDate":"2022-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Toward Efficient Logic-in-Memory Computing With Magnetic Reconfigurable Logic Circuits 利用磁可重构逻辑电路实现存储器计算中的高效逻辑

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2022-01-27 DOI: 10.1109/LMAG.2022.3146060

Farzad Razi;Mohammad Hossein Moaiyeri;Siamak Mohammadi

{"title":"Toward Efficient Logic-in-Memory Computing With Magnetic Reconfigurable Logic Circuits","authors":"Farzad Razi;Mohammad Hossein Moaiyeri;Siamak Mohammadi","doi":"10.1109/LMAG.2022.3146060","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3146060","url":null,"abstract":"Logic-in-memory (LIM) structures are promising candidates to obviate limitations of the conventional von Neumann architecture, especially in big data applications, such as image processing. In this paradigm, simple logic operations are embedded in memory to perform basic processes and consequently decrease the workload of the main processor. This letter presents an efficient hybrid fin field-effect transistor and magnetic tunnel junction (MTJ) logic structure compatible with all kinds of memory and which performs \u0000<sc>nor/or\u0000 and \u0000<sc>nand/and\u0000 operations. The design utilizes MTJs to obtain different voltage levels and two sense amplifiers to generate the outputs. Simulation results assert that the design improves the delay and power by 33% and 20%, respectively, compared to its state-of-the-art counterparts. Moreover, the magnetic LIM structure is appropriately utilized in image processing applications, such as minimum and maximum image filters, for preparing intermediate data. In the case study, high-level simulations indicate that the design reduces the delay and power by 31% and 21%, respectively.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"13 ","pages":"1-5"},"PeriodicalIF":1.2,"publicationDate":"2022-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

MESO Neuron: A Low-Power and Ultrafast Spin Neuron for Neuromorphic Computing MESO神经元：一种用于神经形态计算的低功耗超快自旋神经元

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2022-01-27 DOI: 10.1109/LMAG.2022.3146130

Junwei Zeng;Yabo Chen;Jiahao Liu;Chenglong Huang;Nuo Xu;Cheng Li;Liang Fang

{"title":"MESO Neuron: A Low-Power and Ultrafast Spin Neuron for Neuromorphic Computing","authors":"Junwei Zeng;Yabo Chen;Jiahao Liu;Chenglong Huang;Nuo Xu;Cheng Li;Liang Fang","doi":"10.1109/LMAG.2022.3146130","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3146130","url":null,"abstract":"In this letter, a low-power and ultrafast spin neuron for mimicking biological neurons based on magneto-electric spin-orbit (MESO) neurons is presented. First, the physical model of a MESO neuron based on the Landau–Lifshitz–Gilbert (LLG) equation at room temperature is built for investigating the characteristics. By utilizing these characteristics of the MESO device, a current pulse is used to induce the stochastic switching behaviors. We successfully mimic the behavior of the biological neuron with single activation time down to 0.8 ns. Second, using model-derived device parameters, we further simulate a three-layer fully connected neural network using MESO neurons. Using the Mixed National Institute of Standards and Technology database handwritten pattern dataset, our system achieves a recognition accuracy of 98%. In addition, the influence of pulsewidth and amplitude on activation functions of MESO neurons is researched using HSPICE tools. The results show that as pulsewidth and amplitude are increasing, the power consumption and computing time increase while the energy consumption decreases. Specifically, the power consumption performance of a MESO neuron is about 10 µW and improved approximately three orders of magnitude compared to a 45 nm CMOS neuron.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"13 ","pages":"1-5"},"PeriodicalIF":1.2,"publicationDate":"2022-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Time-Varying Magnetic Field to Enhance the Navigation of Magnetic Microparticles in a Bifurcated Channel 时变磁场增强磁性微粒在分叉通道中的导航

IF 1.2 4区物理与天体物理

IEEE Magnetics Letters Pub Date : 2022-01-27 DOI: 10.1109/LMAG.2022.3146846

Pralay Chakrabarty;Roy P. Paily

{"title":"Time-Varying Magnetic Field to Enhance the Navigation of Magnetic Microparticles in a Bifurcated Channel","authors":"Pralay Chakrabarty;Roy P. Paily","doi":"10.1109/LMAG.2022.3146846","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3146846","url":null,"abstract":"This letter investigates the navigation of magnetic microparticles (MMPs) in a Y-shaped microfluidic channel under the influence of an external magnetic field. The external magnetic field exerts a magnetic force on the magnetizable MMPs to steer them from the bifurcation point to the desired channel. During this process, some MMPs aggregate and stick to the channel walls, thus reducing the efficacy of the navigation process. To mitigate this problem, a time-varying magnetic field (TVMF) is applied for efficient navigation of the MMPs in the channel. The TVMF alternately switches between two modes of operation described as follows. In the first mode of operation, the TVMF is applied for a certain time duration to generate the magnetic force required for steering the MMPs to the desired outlet. The second mode of operation facilitates mitigation of the stiction and aggregation of MMPs by modulating the TVMF and time duration of operation, so as to yield a lower magnetic force in the reverse direction to that in the first mode. Extensive simulations are performed to analyze the switching time for effective steering of the MMPs using COMSOL Multiphysics. Results illustrate that the time duration between the two modes of operation should be set using a ratio of 3\u0000<inline-formula><tex-math>$:$</tex-math></inline-formula>\u00001 for effective guidance of the MMPs to the correct outlet.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":"13 ","pages":"1-5"},"PeriodicalIF":1.2,"publicationDate":"2022-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1