論文

査読有り
2016年

Effective Damping Constant and Current Induced Magnetization Switching of GdFeCo/TbFe Exchange-Coupled Bilayers

IEEE MAGNETICS LETTERS
  • Tomohiro Higashide
  • ,
  • Bing Dai
  • ,
  • Takeshi Kato
  • ,
  • Daiki Oshima
  • ,
  • Satoshi Iwata

7
開始ページ
3505605-1-5
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1109/LMAG.2016.2595502
出版者・発行元
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

The Gilbert damping constants alpha and effective perpendicular magnetic anisotropies K-eff of amorphous GdFeCo (10 - x nm)/TbFe (x nm) exchange-coupled bilayers with various TbFe layer thicknesses x were measured. The products alpha x K-eff of the bilayers were compared with the critical current densities J(c) for current-induced magnetization switching (CIMS) in giant magnetoresistance nanopillars with a GdFeCo/TbFe memory layer. The damping constant alpha of the bilayers, estimated from time-resolved magneto-optical Kerr effect measurements, was 0.051 for x = 0, and was significantly enhanced to 0.23 for x = 1. The anisotropy constant K-eff and the product of saturation magnetization times anisotropy field M-s H-k also increased with increasing TbFe thickness x. The CIMS of the GdFeCo (9 nm)/TbFe (1 nm) bilayer exhibited 1.6 times larger J(c) than that of GdFeCo (10 nm), while the product alpha x K-eff increased by a factor of 10.

リンク情報
DOI
https://doi.org/10.1109/LMAG.2016.2595502
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000384310800001&DestApp=WOS_CPL
ID情報
  • DOI : 10.1109/LMAG.2016.2595502
  • ISSN : 1949-307X
  • Web of Science ID : WOS:000384310800001

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