空中骑兵
凝聚态物理
振荡(细胞信号)
垂直的
各向异性
物理
自旋(空气动力学)
纳米-
化学
光学
量子力学
几何学
数学
生物化学
热力学
作者
Wenbo Zhang,Zhiwei Hou,Hong Zhang,Yanwei Luo
标识
DOI:10.1088/1361-6463/aca989
摘要
Abstract Magnetic skyrmion has the advantages of stable topology and small volume. Many researchers choose different materials or build double free layers for using skyrmions in spin torque nano-oscillators capable of producing GHz frequencies. In this paper, the dynamics of the two semi-skyrmions in a circular nano-pillar with perpendicular magnetic anisotropy free layer and a spin polarizer are studied using micromagnetic simulation. The oscillation frequency of two semi-skyrmions is more than two times higher that of the single semi-skyrmion. In addition, we also explore the influences of different parameters (current density, damping coefficient, anisotropy constant, and temperature) on the motion of two semi-skyrmions. The results show that damping coefficient and exchange interaction constant have the most pronounced influence on the oscillation frequency of the system.
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