Impact of oxygen interdiffusion on spin-to-charge conversion at nonmagnetic metal/Bi oxide interfaces

S. Sugimoto, J. Uzuhashi, S. Isogami, T. Ohkubo, Y. K. Takahashi, S. Kasai, K. Hono

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Spin-to-charge conversion at metal/oxide interfaces with stacked structures of permalloy/(Cu or Ag)/Bi2O3 were systematically investigated by using the spin-pumping technique and cross-sectional transmission electron microscopy. Although the transport measurement reproduced the results in previous studies, the interfacial structure of (Cu or Ag)/Bi2O3 was found to change depending on the crystalline orientation of the Cu or Ag underlayer. While the Ag/Bi2O3 stacks with Ag(111) had steep interfaces, the formation of a nanometer-scale Cu-O layer can be found in the Cu/Bi2O3 interface, which should be the main origin of the sign inversion of the conversion coefficients between Cu/Bi2O3 and Ag/Bi2O3. This study stresses the importance of nanostructure identification for discussing spin-to-charge conversions at metal/oxide interfaces.

本文言語English
論文番号104410
ジャーナルPhysical Review Materials
3
10
DOI
出版ステータスPublished - 2019 10 14
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 物理学および天文学(その他)

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