本文主要研究内容
作者李化南,笵紫薇,李佳欣,胡月,刘惠莲（2019）在《Magnetic vortex gyration mediated by point-contact position》一文中研究指出：Micromagnetic simulation is employed to study the gyration motion of magnetic vortices in distinct permalloy nanodisks driven by a spin-polarized current. The critical current density for magnetic vortex gyration, eigenfrequency, trajectory, velocity and the time for a magnetic vortex to obtain the steady gyration are analyzed. Simulation results reveal that the magnetic vortices in larger and thinner nanodisks can achieve a lower-frequency gyration at a lower current density in a shorter time. However, the magnetic vortices in thicker nanodisks need a higher current density and longer time to attain steady gyration but with a higher eigenfrequency. We also find that the point-contact position exerts different influences on these parameters in different nanodisks, which contributes to the control of the magnetic vortex gyration. The conclusions of this paper can serve as a theoretical basis for designing nano-oscillators and microwave frequency modulators.
Abstract
Micromagnetic simulation is employed to study the gyration motion of magnetic vortices in distinct permalloy nanodisks driven by a spin-polarized current. The critical current density for magnetic vortex gyration, eigenfrequency, trajectory, velocity and the time for a magnetic vortex to obtain the steady gyration are analyzed. Simulation results reveal that the magnetic vortices in larger and thinner nanodisks can achieve a lower-frequency gyration at a lower current density in a shorter time. However, the magnetic vortices in thicker nanodisks need a higher current density and longer time to attain steady gyration but with a higher eigenfrequency. We also find that the point-contact position exerts different influences on these parameters in different nanodisks, which contributes to the control of the magnetic vortex gyration. The conclusions of this paper can serve as a theoretical basis for designing nano-oscillators and microwave frequency modulators.
论文参考文献
[1].Thermally activated flux flow, vortex-glass phase transition and the mixed-state Hall effect in 112-type iron pnictide superconductors[J]. XiangZhuo Xing,ZhanFeng Li,XiaoLei Yi,JiaJia Feng,ChunQiang Xu,Nan Zhou,Yan Meng,YuFeng Zhang,YongQiang Pan,LingYao Qin,Wei Zhou,HaiJun Zhao,ZhiXiang Shi. Science China(Physics,Mechanics & Astronomy).2018(12)[2].Rotation of a single vortex in dusty plasma[J]. 闫佳,冯帆,刘富成,贺亚峰. Chinese Physics B.2017(09)[3].Exchange interaction between vortex and antivortex[J]. 柳艳,李化南,胡勇,杜安. Chinese Physics B.2014(08)[4].Mechanisms of the pancake vortex and vortex line movement in the high Tc superconductors Bi2Sr2CaCu2O8+δ and La1.93Sr0.07CuO4+δ[J]. WANG WeiXian1,ZHOU Fang2,TAN Shun1,WU Huan1 & ZHANG YuHeng1 1 National High Magnetic Field Laboratory,University of Science and Technology of China,Hefei 230026,China;2 National Laboratory for Superconductivity,lnstitute of Physics and the Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100080,China. Science in China(Series G:Physics,Mechanics & Astronomy).2007(02)[5].Analysis for the axial force exerted on a micro-particle in the optical vortex[J]. WU Fu-yan, WANG Yu-gang, XU Jian-bo, ZHANG Min, LI Jie, DOU Hui-qing, and ZHU Zhan-shou College of Physics and Electronics, Shandong Normal University, Ji’nan 250014,China. Optoelectronics Letters.2007(06)[6].Angular Momentum of Vortex in Jackiw-Pi Model[J]. Li Xiguo, Liu Ziyu,Li Yongqing, Gao Yuan, Guo Yanrui and Xiao Guoqing. IMP & HIRFL Annual Report.2005(00)[7].A δ-function-like peak in the specific heat of two-dimensional vortex lattice: Monte carlo study[J]. 梁彦天,曹义刚,焦正宽. "Journal of Zhejiang University Science J".2002(01)[8].Studies on the Aero-optical Phenomena of Free-vortex Aerodynamic Window′s Jet[J]. 刘天华,姜宗福,李文煜,王云萍,刘泽金,赵伊君. Chinese Journal of Lasers.2002(06)[9].APPLICATION OF HARMONIC ANALYSIS METHOD TO RESEARCH ON ROTOR AIRLOADS[J]. Qiu Zhenhan, Xue Zhengzhong and Duan Yujian Chinese Hclicopter Research and Development Institute. Chinese Journal of Aeronautics.1988(02)[10].A STUDY OF THE ROTOR WAKE IN NAP-OF-THE-EARTH[J]. He Chengjan and Gao Zheng Nanjing Aeronautical Institute. Chinese Journal of Aeronautics.1988(02)
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论文作者分别是来自Chinese Physics B的李化南,笵紫薇,李佳欣,胡月,刘惠莲，发表于刊物Chinese Physics B2019年10期论文，是一篇关于,Chinese Physics B2019年10期论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自Chinese Physics B2019年10期论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
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李化南：Magnetic vortex gyration mediated by point-contact position论文
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