Rf auto-oscillations in antiferromagnetically coupled layers with different coupling strengths

Takeshi Seki, Hiroyuki Tomita, Teruya Shinjo, Yoshishige Suzuki

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

rf auto-oscillation induced by spin-transfer torque was investigated in Fe/Cr/Fe systems that had antiferromagnetically coupled Fe layers. As the coupling strength increased, the generation linewidth (Δf) reduced remarkably whereas the oscillation frequency (f) and the onset current of the auto-oscillation increased. The strong antiferromagnetic coupling led to less variation in f depending on the bias current. These results indicate that the antiferromagnetic coupling allows us to reduce Δf and to control the nonlinearity of the rf auto-oscillation.

Original languageEnglish
Article number162508
JournalApplied Physics Letters
Volume97
Issue number16
DOIs
Publication statusPublished - 2010 Oct 18

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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