Spin current related magnetoresistance in epitaxial Pt/Co bilayers in the presence of spin Hall effect and Rashba-Edelstein effect

Ye Du, Saburo Takahashi, Junsaku Nitta

Research output: Contribution to journalArticlepeer-review

Abstract

We analyze the experimentally obtained spin current related magnetoresistance (MR) in epitaxial Pt/Co bilayers by using a drift-diffusion model that incorporates both bulk spin Hall effect and interfacial Rashba-Edelstein effect (REE). The MR analysis yields, for the Pt/Co interface, a temperature-independent Rashba parameter in the order of 10-11eVm that agrees with theoretical calculations, along with an effective interfacial REE thickness of several angstroms, which is in overall consistency with our previous spin-orbit torque analysis. Our results suggest that both bulk and interface charge-spin current interconversions need to be taken into account for the spin current related MR analysis in highly conductive magnetic heterostructures such as the epitaxial Pt/Co bilayers.

Original languageEnglish
Article number094419
JournalPhysical Review B
Volume103
Issue number9
DOIs
Publication statusPublished - 2021 Mar 12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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