論文

査読有り
2020年10月

Current-induced linear motion of antiferromagnetically coupled skyrmion-like bubble domains stabilized without Dzyaloshinskii-Moriya interaction

JOURNAL OF PHYSICS D-APPLIED PHYSICS
  • Syuta Honda
  • ,
  • Takamasa Sugahara
  • ,
  • Masaaki Tanaka

担当区分
筆頭著者, 責任著者
53
43
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1088/1361-6463/aba14f
出版者・発行元
IOP PUBLISHING LTD

Magnetic domains are used to represent binary digits in magnetic memories. In domain-motion magnetic memories, the domain must move longitudinally along a ferromagnetic nanowire. Antiferromagnetically coupled magnetic skyrmions, which are domains meeting this requirement, can be stabilized via the Dzyaloshinskii-Moriya interaction (DMI) in an antiferromagnetically coupled bi-layered perpendicularly magnetized thin wire. We find that antiferromagnetically coupled skyrmion-like bubble domains (BDs) may be produced in such a wire without DMI. The stability and the dynamics of such domains are studied by micromagnetic simulations based on the Landau-Lifshitz-Gilbert equation. The BDs in the two layers have clockwise and anti-clockwise Bloch type domain walls, so the BD cores have anti-parallel magnetic moments and are antiferromagnetically coupled. Domain size decreases with decreasing wire width and/or increasing antiferromagnetic coupling strength of the wire. The minimum value of the BD radius is about 10 nm. When a spin-polarized current flows through the wire, the BD moves with the current.


リンク情報
DOI
https://doi.org/10.1088/1361-6463/aba14f
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000560099900001&DestApp=WOS_CPL

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