Enhancement of microwave oscillation under angled in-plane magnetic field in ferromagnetic nano-contact spin-valves

Hiroaki Suzuki, Tetsuya Nakamura, Hiroaki Endo, Masaaki Doi, Hiroshi Tsukahara, Hiroshi Imamura, Hiromi N. Fuke, Susumu Hashimoto, Hitoshi Iwasaki, Masashi Sahashi

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We investigated the microwave oscillation of resistance due to spin-transfer torque in ferromagnetic nano-contact spin-valves under an external in-plane magnetic field. We varied the direction of the external magnetic field and therefore the relative angle, θ, between magnetizations of the free and reference layers. We showed that the level of microwave oscillation takes a maximum value at around θ =140°. We also showed that the microwave oscillation frequency increases with increases in the applied direct current.

Original languageEnglish
Article number092507
JournalApplied Physics Letters
Volume99
Issue number9
DOIs
Publication statusPublished - 2011 Aug 29

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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