Stabilization of Skyrmions in a Nanodisk Without an External Magnetic Field

被引：11

作者：

Li, Hang ^{[1
]}

Akosa, Collins Ashu ^{[1
,2
,3
]}

Yan, Peng ^{[4
,5
]}

Wang, Yuanxu ^{[1
]}

Cheng, Zhenxiang ^{[6
]}

机构：

[1] Henan Univ, Sch Phys & Elect, Inst Computat Mat Sci, Kaifeng 475004, Peoples R China

[2] RIKEN Ctr Emergent Matter Sci CEMS, 2-1 Hirosawa, Wako, Saitama 3510198, Japan

[3] African Univ Sci & Technol, Dept Theoret & Appl Phys, Km 10 Airport Rd, Abuja, Fct, Nigeria

[4] Univ Elect Sci & Technol China, Sch Elect Sci & Engn, Chengdu 610054, Peoples R China

[5] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

[6] Univ Wollongong, Inst Superconducting & Elect Mat, Australian Inst Innovat Mat, Innovat Campus,Squires Way, North Wollongong, NSW 2500, Australia

来源：

PHYSICAL REVIEW APPLIED | 2020年 / 13卷 / 03期

基金：

中国国家自然科学基金; 日本学术振兴会; 澳大利亚研究理事会;

关键词：

CURRENT-DRIVEN DYNAMICS; REAL-SPACE OBSERVATION; STATES; STABILITY; RESONANCE; LATTICE;

D O I：

10.1103/PhysRevApplied.13.034046

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study, in the absence of a magnetic field, the stability of skyrmions in a disk-shaped ferromagnetic multilayer in the presence of locally pinned spins at the edge. This particular boundary condition suppresses the formation of helical states yet enhances the stabilization of states with rotational symmetry, such as Neel skyrmions. Numerical simulation shows that the size of the disk is a viable parameter to control the creation and annihilation of skyrmionic states. We also find that the demagnetization field renormalizes the Dzyaloshinskii-Moriya interaction. This study opens an alternative avenue to the generation, stabilization, and control of magnetic skyrmions in field-free heterostructures.

引用

页数：8

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