Pub Date : 2022-06-16DOI: 10.1109/LMAG.2022.3183493
Xian Shi;Guifu Ding
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.
{"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":"13 ","pages":"1-5"},"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}
Pub Date : 2022-04-28DOI: 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
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 0.15 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 0.15 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 $lambda_{rm ij}^{alpha}$ .
{"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":"13 ","pages":"1-5"},"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}
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 2 MnGa, 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.
{"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":"13 ","pages":"1-5"},"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}
Pub Date : 2022-04-04DOI: 10.1109/LMAG.2022.3164631
Sergey V. Stolyar;Irina G. Vazhenina;Roman N. Yaroslavtsev;Lidia A. Chekanova;Elena V. Cheremiskina;Yuri L. Mikhlin
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.
{"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":"13 ","pages":"1-5"},"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}
Pub Date : 2022-03-30DOI: 10.1109/LMAG.2022.3178667
Rambabu Kuchi;Vitalii Galkin;Seunghyun Kim;Jong-Ryul Jeong;Soon-jik Hong;Dongsoo Kim
Neodymium–iron–boron (NdFeB) magnetic particles with high ( BH ) max 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: ( BH ) max of 14.06 MG·Oe, coercivity ( HC ) of 3.9 kOe, and remanence ( MR ) 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.
{"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":"13 ","pages":"1-4"},"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}
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.
{"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":"13 ","pages":"1-5"},"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}
Pub Date : 2022-03-29DOI: 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
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.
{"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":"13 ","pages":"1-5"},"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}
Pub Date : 2022-03-15DOI: 10.1109/LMAG.2022.3159446
Melike Ergor;Ayhan Bingolbali
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.
{"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":"13 ","pages":"1-4"},"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}
Pub Date : 2022-03-11DOI: 10.1109/LMAG.2022.3174514
Xuan Hu;Benjamin W. Walker;Felipe García-Sánchez;Alexander J. Edwards;Peng Zhou;Jean Anne C. Incorvia;Alexandru Paler;Michael P. Frank;Joseph S. Friedman
Magnetic skyrmions are nanoscale whirls of magnetism that can be propagated with electrical currents. The repulsion between skyrmions inspires their use for reversible computing based on the elastic billiard ball collisions proposed for conservative logic in 1982. In this letter, we evaluate the logical and physical reversibility of this skyrmion logic paradigm, as well as the limitations that must be addressed before dissipation-free computation can be realized.
{"title":"Logical and Physical Reversibility of Conservative Skyrmion Logic","authors":"Xuan Hu;Benjamin W. Walker;Felipe García-Sánchez;Alexander J. Edwards;Peng Zhou;Jean Anne C. Incorvia;Alexandru Paler;Michael P. Frank;Joseph S. Friedman","doi":"10.1109/LMAG.2022.3174514","DOIUrl":"https://doi.org/10.1109/LMAG.2022.3174514","url":null,"abstract":"Magnetic skyrmions are nanoscale whirls of magnetism that can be propagated with electrical currents. The repulsion between skyrmions inspires their use for reversible computing based on the elastic billiard ball collisions proposed for conservative logic in 1982. In this letter, we evaluate the logical and physical reversibility of this skyrmion logic paradigm, as well as the limitations that must be addressed before dissipation-free computation can be realized.","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":"67740918","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}
Pub Date : 2022-03-11DOI: 10.1109/LMAG.2022.3174522
Emil R. Mamleyev;Achim Voigt;Ali Moazenzadeh;Jan G. Korvink;Manfred Kohl;Kirill Poletkin
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 $mu$ m and 14 windings, the outer coil with a diameter of 1900 $mu$ m 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 $mu$ m diameter disc-shaped proof mass at a height up to 45 $mu$ m.
{"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}
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