文献详情
Magnetic Skyrmion Spectrum Under Voltage Excitation and its Linear Modulation
文献类型期刊
作者Chen, Xing[1];Kang, Wang[2];Zhu, Daoqian[3];Lei, Na[4];Zhang, Xichao[5];Zhou, Yan[6];Zhang, Youguang[7];Zhao, Weisheng[8]
机构
通讯作者Kang, W (reprint author), Beihang Univ, BDBC, Fert Beijing Inst, Beijing 100191, Peoples R China.; Kang, W (reprint author), Beihang Univ, Sch Microelect, Beijing 100191, Peoples R China.
2019
期刊名称PHYSICAL REVIEW APPLIED影响因子和分区
来源信息年:2019  卷:12  期:2  
12
期刊信息PHYSICAL REVIEW APPLIED影响因子和分区  ISSN:2331-7019
2
增刊正刊
摘要Magnetic skyrmions are topological quasiparticles with great potential for applications in future information storage and processing devices because of their nanoscale size, high stability, and large velocity. Recently, the high-frequency properties of skyrmions have been explored for magnon nanodevices. We systematically study the dynamics of an isolated skyrmion under voltage excitation through the voltage-controlled magnetic anisotropy effect in a circular thin film. A theoretical model considering the demagnetization energy, which has often been neglected or treated superficially in previous skyrmion research but is demonstrated to have importance in determining the skyrmion dynamic state, is developed. With our model, the periodic oscillation of the skyrmion radius can be solved numerically with similar precision compared to micromagnetic simulations, and the characteristic frequency (f(c)) of the skyrmion breathing can be determined analytically with greater precision than previous studies. Furthermore, we find that the breathing skyrmion can be analogized as a modulator by investigating its linear modulation functionality under sinusoidal-form voltage excitation. Different from the conventional modulation system with complex CMOS circuits, this skyrmion "modulator" device integrates with both the modulation and carrier wave generation functionality, thus showing greater convenience and efficiency in applications. Our findings can provide useful guidance for both theoretical and experimental skyrmions research as well as the development of skyrmion-based magnonic devices with significant potential applicability in future communication systems.
收录情况SCIE(WOS:000479007100002)  EI(20193307316416)  
所属部门电子信息工程学院
DOI10.1103/PhysRevApplied.12.024008
百度学术Magnetic Skyrmion Spectrum Under Voltage Excitation and its Linear Modulation
语言外文
ISSN2331-7019
人气指数180
浏览次数180
基金National Natural Science Foundation of China [61871008, 61571023, 61627813, 11574018, 11574137]; National Key Technology Program of China [2017ZX01032101]; Presidential Postdoctoral Fellowship of The Chinese University of Hong Kong, Shenzhen (CUHKSZ); CUHKSZ; Shenzhen Fundamental Research Fund [JCYJ20160331164412545, JCYJ20170410171958839]
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