Spin-Torque Oscillator Based on Magnetic Domain and Meron

Gang Lv; Gang Lv; Hong Zhang; Hong Zhang; Xuecheng Cao; Feng Gao; Guihua Li; Fengwei Sun; Zhiwei Hou; Yaowen Liu

doi:10.3389/fphy.2022.839434

Frontiers in Physics (Feb 2022)

Spin-Torque Oscillator Based on Magnetic Domain and Meron

Gang Lv,
Gang Lv,
Hong Zhang,
Hong Zhang,
Xuecheng Cao,
Feng Gao,
Guihua Li,
Fengwei Sun,
Zhiwei Hou,
Yaowen Liu

Affiliations

Gang Lv: Information Science and Engineering School, Shandong Agricultural University, Taian, China
Gang Lv: Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Shanghai, China
Hong Zhang: Information Science and Engineering School, Shandong Agricultural University, Taian, China
Hong Zhang: Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Shanghai, China
Xuecheng Cao: Information Science and Engineering School, Shandong Agricultural University, Taian, China
Feng Gao: Information Science and Engineering School, Shandong Agricultural University, Taian, China
Guihua Li: Information Science and Engineering School, Shandong Agricultural University, Taian, China
Fengwei Sun: Information Science and Engineering School, Shandong Agricultural University, Taian, China
Zhiwei Hou: Department of Physics, Henan University of Technology, Zhengzhou, China
Yaowen Liu: School of Physics Science and Engineering, Tongji University, Shanghai, China

DOI: https://doi.org/10.3389/fphy.2022.839434
Journal volume & issue: Vol. 10

Abstract

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In this work, micromagnetic simulations demonstrate that a steady oscillation mode accompanied by magnetic domain splitting and the creation and annihilation of meron can be excited by spin-polarized currents. It is found that the in-plane magnetic anisotropy and Dzyaloshinskii-Moriya interaction (DMI) have a greater influence on the oscillation frequency. The oscillation frequency can vary from 3 GHz to 31 GHz by controlling anisotropy strength under a fixed current density. By changing DMI strength, the oscillation frequency varies from 9 to 13.6 GHz and from 29.7 to 37 GHz. Compared with ferromagnetic skyrmion-based spin-torque oscillators (STOs), the STOs based on this magnetic domain and meron further increase the oscillation frequency. Our results may provide theoretical support for the research and development of future high-frequency STOs.

Published in Frontiers in Physics

ISSN: 2296-424X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Physics
Website: https://www.frontiersin.org/journals/physics

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