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

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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. (C) 2019 The Japan Society of Applied Physics
Publisher
IOP PUBLISHING LTD
Issue Date
2019-06
Language
English
Article Type
Article
Citation

APPLIED PHYSICS EXPRESS, v.12, no.6, pp.063001

ISSN
1882-0778
DOI
10.7567/1882-0786/ab1b54
URI
http://hdl.handle.net/10203/262239
Appears in Collection
PH-Journal Papers(저널논문)
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