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Development of a Temperature Sensor Using Spin-Crossover Fe(pyrazine)[Pt(CN)4I] Nanoparticles 利用自旋交叉Fe（吡嗪）[Pt（CN）4I]纳米粒子的温度传感器的研制
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-07-08 DOI: 10.1109/LMAG.2022.3189274
Yunji Eom;Keonmok Kim;Hyeon-Jun Lee;Sri Ramulu Torati;CheolGi Kim
{"title":"Development of a Temperature Sensor Using Spin-Crossover Fe(pyrazine)[Pt(CN)4I] Nanoparticles","authors":"Yunji Eom;Keonmok Kim;Hyeon-Jun Lee;Sri Ramulu Torati;CheolGi Kim","doi":"10.1109/LMAG.2022.3189274","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3189274","url":null,"abstract":"Device miniaturization requires temperature sensors with high resolution and precise calibration for measurements at reduced scale. We developed an optical temperature sensor using Fe\u0000<sup>2+</sup>\u0000 spin-crossover (SCO) material that has low and high spin states depending on temperature. We adjusted the operating range of the SCO (295–365 K) with an appropriate concentration of iodine. The color induced by temperature change was observed with a microscope and was converted to the color intensity represented in grayscale. To test the material, we covered the surface of a gold microheater with a layer of Fe(pyrazine)[Pt(CN)\u0000<sub>4</sub>\u0000I] SCO nanoparticles and compared optically measured temperatures with those from a conventional temperature sensor. We conclude that the thermochromic temperature sensor is suitable for measuring temperature changes in microdevices, even in ambient light.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741203","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
Normal Stress of a Micro–Nano Magnetorheological Elastomer 微纳米磁流变弹性体的法向应力
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-06-17 DOI: 10.1109/LMAG.2022.3184259
Xuhui Liu;Jinghu Wang;Huina Hu;Ziyun Fang;Bin Xu;Yan Wu;Lei Gao;Meiling Pu
{"title":"Normal Stress of a Micro–Nano Magnetorheological Elastomer","authors":"Xuhui Liu;Jinghu Wang;Huina Hu;Ziyun Fang;Bin Xu;Yan Wu;Lei Gao;Meiling Pu","doi":"10.1109/LMAG.2022.3184259","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3184259","url":null,"abstract":"A micro–nano magnetorheological elastomer (MRE) containing Fe\u0000<sub>3</sub>\u0000O\u0000<sub>4</sub>\u0000 nanoparticles was prepared, and its mechanical properties were analyzed. A microscopic static force model was used for MREs with different concentrations of nanomagnetic particles. To investigate the mechanical properties, an experimental platform was built, and its magnetic field flux was simulated with finite-element software. The results show that the maximum compressive elastic modulus for MREs containing 10% Fe\u0000<sub>3</sub>\u0000O\u0000<sub>4</sub>\u0000 nanoparticles is 2.89 MPa, which is 149% that of a traditional MRE under the same magnetic field. The normal stress of micro–nano MRE was significantly improved, which could be useful in the development of high-performance MREs.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741241","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
An Optimized Magnet Circuit Design to Reduce Power Consumption for Torsional Electromagnetic Actuators 降低扭转电磁执行器功耗的优化磁路设计
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-06-16 DOI: 10.1109/LMAG.2022.3183493
Xian Shi;Guifu Ding
{"title":"An Optimized Magnet Circuit Design to Reduce Power Consumption for Torsional Electromagnetic Actuators","authors":"Xian Shi;Guifu Ding","doi":"10.1109/LMAG.2022.3183493","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3183493","url":null,"abstract":"A torsional electromagnetic actuator that is actuated by the torque applied to a planar coil in an external magnetic field is designed, modeled, and analyzed in this letter. The analytical model of the magnetic torque is established. A magnet combination consisting of a rectangular magnet and a square-ring magnet magnetized in opposite directions is developed. A novel magnetic circuit is designed and analyzed to increase the driving torque. The electromagnetic and mechanical responses of the device are characterized by finite element simulation. In the case study, the power consumption of the actuator is significantly reduced by 54.3%, and down to 3.05 mW at the mechanical torsion angle of 11°. The effect of air gap on power consumption is also studied quantitatively.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741229","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
Magnetic Phase Transitions in GdH0.15: Some Peculiarities in the Behavior of Magnetocaloric and Magnetostrictive Effects GdH0.15的磁相变：磁热效应和磁致伸缩效应的一些特性
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-04-28 DOI: 10.1109/LMAG.2022.3171089
Galina A. Politova;Irina S. Tereshina;Evgenia A. Tereshina-Chitrova;Barbora Vondráčková;Jiří Pospíšil;Mikhail A. Paukov;Alexander V. Andreev
{"title":"Magnetic Phase Transitions in GdH0.15: Some Peculiarities in the Behavior of Magnetocaloric and Magnetostrictive Effects","authors":"Galina A. Politova;Irina S. Tereshina;Evgenia A. Tereshina-Chitrova;Barbora Vondráčková;Jiří Pospíšil;Mikhail A. Paukov;Alexander V. Andreev","doi":"10.1109/LMAG.2022.3171089","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3171089","url":null,"abstract":"The magnetocaloric effect (MCE) and anomalies of magnetostriction behavior were studied at the order-order and order-disorder magnetic phase transitions in hydrided Gd single crystal grown by a modified Czochralski method. The composition GdH\u0000<sub>0.15</sub>\u0000 was obtained using a Sievert-type apparatus. While parent Gd shows an isotropic MCE at the order-disorder phase transition, the effect is anisotropic in GdH\u0000<sub>0.15</sub>\u0000 due to the appearance of local anisotropy. We investigate in detail the temperature variation of the longitudinal, transverse, volume, and anisotropic magnetostriction. Hydrogenation is found to influence both the magnitude and the sign of the magnetostriction constants \u0000<inline-formula><tex-math>$lambda_{rm ij}^{alpha}$</tex-math></inline-formula>\u0000.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67901202","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
Large Anomalous Nernst Angle in Co2MnGa Thin Film Co2MnGa薄膜中的大异常能斯特角
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-04-13 DOI: 10.1109/LMAG.2022.3167332
Junfeng Hu;Yao Zhang;Xiayu Huo;Ningsheng Li;Song Liu;Dapeng Yu;Jean-Philippe Ansermet;Simon Granville;Haiming Yu
{"title":"Large Anomalous Nernst Angle in Co2MnGa Thin Film","authors":"Junfeng Hu;Yao Zhang;Xiayu Huo;Ningsheng Li;Song Liu;Dapeng Yu;Jean-Philippe Ansermet;Simon Granville;Haiming Yu","doi":"10.1109/LMAG.2022.3167332","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3167332","url":null,"abstract":"The new trends for anomalous Nernst effect (ANE)-based thermoelectric devices require materials with large ANE values to realize the scalable generation of voltage. Recently, very large ANE values have been observed in single crystals of some novel magnetic materials. However, to allow work to proceed on developing ANE-based devices, these materials need to be produced in thin-film form, and to date, thin films have not achieved the same large ANE values as bulk materials. In this letter, we report a large ANE in a 50 nm thick film of ferromagnetic Heusler alloy Co\u0000<sub>2</sub>\u0000MnGa, matching the values achieved in the bulk material. By systematically mapping the thermoelectric transport properties, we extracted an anomalous Nernst angle in the range of 11.5% –14.2% at 300 K.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67740909","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
Magnetic Composite Coatings FeC and NiC Synthesized With Arabinogalactan 阿拉伯半乳聚糖合成磁性复合涂层FeC和NiC
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-04-04 DOI: 10.1109/LMAG.2022.3164631
Sergey V. Stolyar;Irina G. Vazhenina;Roman N. Yaroslavtsev;Lidia A. Chekanova;Elena V. Cheremiskina;Yuri L. Mikhlin
{"title":"Magnetic Composite Coatings FeC and NiC Synthesized With Arabinogalactan","authors":"Sergey V. Stolyar;Irina G. Vazhenina;Roman N. Yaroslavtsev;Lidia A. Chekanova;Elena V. Cheremiskina;Yuri L. Mikhlin","doi":"10.1109/LMAG.2022.3164631","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3164631","url":null,"abstract":"In this work, we investigated the ferromagnetic resonance spectra of metal/carbon composite coatings. FeC and NiC coatings were synthesized by electroless deposition using polysaccharide arabinogalactan. An analysis of the angular dependences of the resonance field showed that the coatings consist of three magnetic phases separated by a nonmagnetic phase of carbon.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741214","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
Synthesis of NdFeB Magnetic Particles With High (BH)max From Their Optimized Oxide Powders Through Reduction–Diffusion Method 还原-扩散法制备高（BH）max NdFeB磁性粒子
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-03-30 DOI: 10.1109/LMAG.2022.3178667
Rambabu Kuchi;Vitalii Galkin;Seunghyun Kim;Jong-Ryul Jeong;Soon-jik Hong;Dongsoo Kim
{"title":"Synthesis of NdFeB Magnetic Particles With High (BH)max From Their Optimized Oxide Powders Through Reduction–Diffusion Method","authors":"Rambabu Kuchi;Vitalii Galkin;Seunghyun Kim;Jong-Ryul Jeong;Soon-jik Hong;Dongsoo Kim","doi":"10.1109/LMAG.2022.3178667","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3178667","url":null,"abstract":"Neodymium–iron–boron (NdFeB) magnetic particles with high (\u0000<italic>BH</i>\u0000)\u0000<sub>max</sub>\u0000 were obtained using optimized ball-milled (BM) NdFeB oxide powders, instead of unmilled NdFeB oxide powders, through combined chemical processes comprising the spray drying and reduction-diffusion (RD) methods. The NdFeB oxide particles were subjected to the BM process to control their structural properties, including shape and size of the particles. The oxide powders were critical to make the NdFeB magnetic particles with enhanced properties by the RD process. In general, the controlled structural properties of the NdFeB oxide particles have a significant impact on the properties of final NdFeB magnetic particles. This has been explored through the NdFeB magnetic particles synthesized by utilizing BM oxide powders (0, 1, 2, and 4 h) at different time intervals. One-hour BM oxide powders yielded NdFeB magnetic particles with higher magnetic properties: (\u0000<italic>BH</i>\u0000)\u0000<sub>max</sub>\u0000 of 14.06 MG·Oe, coercivity (\u0000<italic>H<sub>C</sub></i>\u0000) of 3.9 kOe, and remanence (\u0000<italic>M<sub>R</sub></i>\u0000) of 101 emu/g. This was attributed to minimal shape defects and phase purity with high crystallinity for the optimized BM oxide powders. Thus, NdFeB oxide particles directed the final intermetallic NdFeB magnetic particles structural properties, which strongly affected their magnetic properties. This study on oxide powders BM will be useful for the preparation of other intermetallic alloys with enhanced properties.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67902630","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
Novel Radiation Hardened Magnetic Full Adder Using Spin-Orbit Torque for Multinode Upset 用于多节点镦粗的新型辐射硬化自旋轨道力矩磁性全加器
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-03-30 DOI: 10.1109/LMAG.2022.3178627
Alok Kumar Shukla;Arshid Nisar;Seema Dhull;Brajesh Kumar Kaushik
{"title":"Novel Radiation Hardened Magnetic Full Adder Using Spin-Orbit Torque for Multinode Upset","authors":"Alok Kumar Shukla;Arshid Nisar;Seema Dhull;Brajesh Kumar Kaushik","doi":"10.1109/LMAG.2022.3178627","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3178627","url":null,"abstract":"Spintronic-based integrated circuits have been extensively explored as viable contenders for space use since magnetic tunnel junctions (MTJs) are intrinsically immune to radiation effects. On the other hand, their complementary metal–oxide semiconductor (CMOS) peripheral circuitry is still susceptible to radiation-induced single-event upset (SEU) and multinode upset (MNU) caused by charge sharing. It results in localized ionization and flips the data state of memory cells or other logic circuits. To ensure a fault-free operation, this letter proposes a novel radiation-hardened (RH) CMOS peripheral circuitry for a magnetic full adder (MFA) using spin-orbit torque MTJs. The circuit can recover from SEUs as well as MNUs regardless of the accumulated charge. Moreover, the read time and read energy of the circuit are improved by 17.6% and 64%, respectively, when compared to the previously reported RH MFA.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67740920","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: 3
Magnetic Properties of 3d Metal Rods With Composition Gradients Produced by Electroless Deposition 化学沉积复合梯度三维金属棒的磁性能
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-03-29 DOI: 10.1109/LMAG.2022.3163015
Elena A. Denisova;Lidia A. Chekanova;Sergey V. Komogortsev;Svetlana A. Satsuk;Ivan V. Nemtsev;Rauf S. Iskhakov;Sergey V. Semenov
{"title":"Magnetic Properties of 3d Metal Rods With Composition Gradients Produced by Electroless Deposition","authors":"Elena A. Denisova;Lidia A. Chekanova;Sergey V. Komogortsev;Svetlana A. Satsuk;Ivan V. Nemtsev;Rauf S. Iskhakov;Sergey V. Semenov","doi":"10.1109/LMAG.2022.3163015","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3163015","url":null,"abstract":"A comparative study of the magnetic properties of arrays of Co–Ni rods with different composition gradients (smooth or step-like) along the rod axes was carried out. Ordered arrays of Co–Ni nanorods with diameters up to 400 nm and 8 µm length were prepared by electroless plating into a porous nuclear-track-etched polycarbonate membrane. The gradient in Co and Ni composition was confirmed by energy-dispersive X-ray analysis. The variation of Co–Ni contents along the long axis of the rods correlates with the gradient of the magnetization within the rod. Magnetization reversal was studied by analyzing the angular dependence of coercivity and using micromagnetic simulations. For both types of gradient rods, reversal occurs by curling. The local magnetic anisotropy field of rods with a step-type gradient is significantly higher than that for rods with a smooth gradient.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741638","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
Field-Free Line Magnetic Particle Imaging Magnet Design Using Nested Halbach Cylinders 基于嵌套Halbach圆柱的无场线磁粉成像磁体设计
IF 1.2 4区 物理与天体物理
IEEE Magnetics Letters Pub Date : 2022-03-15 DOI: 10.1109/LMAG.2022.3159446
Melike Ergor;Ayhan Bingolbali
{"title":"Field-Free Line Magnetic Particle Imaging Magnet Design Using Nested Halbach Cylinders","authors":"Melike Ergor;Ayhan Bingolbali","doi":"10.1109/LMAG.2022.3159446","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3159446","url":null,"abstract":"Magnetic particle imaging (MPI) is a novel imaging technique that is a promising candidate for practical use in the medical field. The field-free line (FFL) selection field method in MPI provides spatial encoding along a line, resulting in a faster acquisition time and enhanced sensitivity with increased signal-to-noise ratio. To obtain FFL, a magnet system was designed using nested Halbach rings with octagonal-shaped permanent magnets. In this specific study, simulation studies were implemented using this magnet system for a real case. For this purpose, gradient values and stabilities of the magnet system were calculated. In this investigation, a gradient field within 60 mm stability was obtained along each axis. The gradient field attained values up to 6.1 T/m, which is a highly important parameter for spatial resolution in MPI systems.","PeriodicalId":13040,"journal":{"name":"IEEE Magnetics Letters","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2022-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67741219","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
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