Possible contribution of high-energy magnons to unidirectional magnetoresistance in metallic bilayers

Kab Jin Kim, Tian Li, Sanghoon Kim, Takahiro Moriyama, Tomohiro Koyama, Daichi Chiba, Kyoung Jin Lee, Hyun Woo Lee, Teruo Ono

Research output: Contribution to journalArticle

Abstract

We investigate temperature, temporal and magnetic-field dependence of unidirectional magnetoresistance (UMR) in metallic bilayers. The UMR is found to decrease rapidly with reducing temperature and converges to a finite value at low-temperature limit. The temporal dependence shows that the UMR emerges in a nanosecond time scale, which depends on the current amplitude. The magnetic-field dependence shows that the UMR is almost constant up to 5 T. These experimental results imply that the high-energy magnons, which are not considered in existing theory, can be involved in the observed UMR. Our results therefore suggest that a more extended theory is required for the complete understanding of UMR.

Original languageEnglish
Article number063001
JournalApplied Physics Express
Volume12
Issue number6
DOIs
Publication statusPublished - 2019 Jan 1

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ASJC Scopus subject areas

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

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