Current-Induced Dynamics of the Antiferromagnetic Skyrmion and Skyrmionium

Laichuan Shen, Xiaoguang Li, Yuelei Zhao, Jing Xia, Guoping Zhao, and Yan Zhou
Phys. Rev. Applied 12, 064033 – Published 12 December 2019
PDFHTMLExport Citation

Abstract

Antiferromagnetic (AFM) skyrmionium composed of two topological AFM skyrmions shares the merits of an AFM skyrmion, for example, high mobility and no skyrmion Hall effect. Here, we analytically and numerically study the dynamics of the AFM skyrmion and skyrmionium induced by spin currents. Our calculations demonstrate that the current-induced spin-transfer torques can drive AFM skyrmion and skyrmionium with the same speed, while their steady motion speeds induced by spin-orbit torques are different. Furthermore, it is found that due to the existence of the effective AFM texture mass, the AFM skyrmion and skyrmionium obey the momentum theorem, and the time evolution of the position induced by alternating currents presents a phase. Besides, a spin torque nano-oscillator based on the AFM skyrmionium can produce high frequencies, similar to that based on the AFM skyrmion. Numerical simulations are in good agreement with the analytical solutions. Our results demonstrate the inertial dynamics of the AFM skyrmion and skyrmionium and may provide guidelines for building skyrmion-based spintronic devices.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 2 September 2019
  • Revised 12 November 2019

DOI:https://doi.org/10.1103/PhysRevApplied.12.064033

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Laichuan Shen1, Xiaoguang Li1, Yuelei Zhao2, Jing Xia1, Guoping Zhao3,*, and Yan Zhou1,†

  • 1School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
  • 2King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
  • 3College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, China

  • *zhaogp@uestc.edu.cn
  • zhouyan@cuhk.edu.cn

Article Text (Subscription Required)

Click to Expand

Multimedia (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 12, Iss. 6 — December 2019

Subject Areas
Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Applied

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×