Coupled-mode excitations induced in an antiferromagnetically coupled multilayer by spin-transfer torque

Takeshi Seki, Hiroyuki Tomita, Masashi Shiraishi, Teruya Shinjo, Yoshishige Suzuki

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Auto-oscillation of the magnetization in an Fe/Cr/Fe antiferromagnetically coupled multilayer was induced by spin-transfer torque. The acoustic mode, a coupled mode in the multilayer, was excited when a dc bias current was applied at relatively small magnetic fields. The external magnetic field dependence of the oscillation frequency is explained by a macrospin model with an antiferromagnetic coupling field. The excitation of the optical mode is also discussed.

Original languageEnglish
Article number033001
JournalApplied Physics Express
Volume3
Issue number3
DOIs
Publication statusPublished - 2010 Mar 1
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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