論文

2019年1月7日

Spin-orbit torque-induced switching of in-plane magnetized elliptic nanodot arrays with various easy-axis directions measured by differential planar Hall resistance

Applied Physics Letters
  • Yu Takahashi
  • ,
  • Yutaro Takeuchi
  • ,
  • Chaoliang Zhang
  • ,
  • Butsurin Jinnai
  • ,
  • Shunsuke Fukami
  • ,
  • Hideo Ohno

114
1
開始ページ
012410
終了ページ
012410
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1063/1.5075542
出版者・発行元
{AIP} Publishing

Spin-orbit torque-induced switching of an elliptical nanomagnet with an in-plane easy axis allows sub-ns and field-free operation. Since its properties crucially depend on the design of the nanomagnet such as the easy-axis direction, it is of high importance to systematically elucidate the dependence of performance on various parameters of the nanomagnet towards magnetoresistive random access memory applications. Here, we show a scheme to statistically evaluate the switching properties of in-plane nanomagnets in a short turnaround time. We use devices with an array of CoFeB/MgO nanomagnets formed on a cross-shaped Ta/W Hall bar, and the differential planar hall resistance is measured to study the magnetization switching. Using the scheme, we investigate the easy-axis angle dependence of switching properties at zero magnetic fields for various current pulse widths from 100 ms to 1.7 ns. We show that the dependence of threshold switching current on the easy-axis direction significantly varies with the pulse width. Published under license by AlP Publishing.

リンク情報
DOI
https://doi.org/10.1063/1.5075542
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000455893000028&DestApp=WOS_CPL
ID情報
  • DOI : 10.1063/1.5075542
  • ISSN : 0003-6951
  • ISSN : 1077-3118
  • eISSN : 1077-3118
  • ORCIDのPut Code : 95675008
  • Web of Science ID : WOS:000455893000028

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