山东农业大学学报（自然科学版）2025，Vol.56Issue(1)：32-37,6.DOI:10.3969/j.issn.1000-2324.2025.01.004
四重纳米圆盘结构中斯格明子边界态的微磁模拟研究
Micromagnetic Simulation of Edge State Skyrmions in Quadruple-Nanodisk Structures
摘要
Abstract
The spin topological structure of magnetic skyrmions in magnetic materials holds great potential for application in the development of next-generation ultra-high-density,low-energy-consumption,and highly stable information storage devices and microwave emission devices.Spin valve model with Co/Ni material-based free and polarizing layers exhibiting vertical magnetic anisotropy,we investigate the dynamic behavior of the edge mode rotation of non-integral magnetic skyrmions in quadruple-connected nanodisk structures with Dzyaloshinskii-Moriya interaction(DMI)using a combination of micromagnetic simulation and Fourier analysis techniques.By simultaneously applying current and magnetic field along the out-of-plane direction,two steady-state oscillation modes can be observed in the free layer:single-edge mode and double-edge mode.The oscillation frequencies of both modes depend on the overlap degree between the four disks and the rotational symmetry of the geometric shape.Simulation results show that the fundamental frequency value of the periodic oscillation mode decreases with the decrease of overlap degree,and the fundamental frequency of the double-edge state is higher than that of the single-edge state.Moreover,the fundamental frequency of the quadruple rotation-symmetric sample is higher than the fundamental frequency value of the double rotation-symmetric sample.Our research results deepen the understanding of the physical mechanisms of skyrmion dynamics in geometrically confined multilayered nanocolumn structures and provide theoretical support for the development of skyrmion-based spin torque nano-oscillators and magnetic storage devices.关键词
斯格明子/自旋转矩/纳米振荡器/垂直磁各向异性Key words
Skyrmion/spin-torque/nano-oscillator/perpendicular magnetization anisotropy分类
物理学引用本文复制引用
张红,高峰,厉桂华,孙丰伟,吕刚..四重纳米圆盘结构中斯格明子边界态的微磁模拟研究[J].山东农业大学学报（自然科学版）,2025,56(1):32-37,6.基金项目
山东省自然科学基金(ZR2023ME102) （ZR2023ME102）
