Stack structure and temperature dependence of spin-orbit torques in heterostructures with antiferromagnetic PtMn

Ryuichi Itoh, Yutaro Takeuchi, Samik Duttagupta, Shunsuke Fukami, Hideo Ohno

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We evaluate the stack structure and temperature dependence of the spin-orbit torques (SOTs) in metallic antiferromagnet (AFM)/ferromagnet (FM) PtMn/CoFeB heterostructures using an extended harmonic Hall measurement. We show that PtMn/CoFeB exhibits sizable Slonczewski-like and fieldlike SOTs whose magnitude is comparable to that of heterostructures with nonmagnetic heavy metals like Pt or Ta. We also find that the SOTs in our PtMn/CoFeB structures are virtually constant with temperature. The findings will offer clues to understand the generation mechanism of SOTs in AFM/FM systems and pave the way for nonvolatile memory and neuromorphic computing applications.

Original languageEnglish
Article number242404
JournalApplied Physics Letters
Volume115
Issue number24
DOIs
Publication statusPublished - 2019 Dec 9

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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