Current-induced unidirectional magnetoresistance in Pt/FeRh bilayers

ORAL

Abstract

The unidirectional magnetoresistance (UMR) effect has garnered considerable interest since it can provide fundamental insight into the transport properties of spin-orbit coupled systems. The origin of the UMR in ferromagnet and non-magnetic bilayers has been actively studied [1,2] but experimental investigations of the UMR in metallic antiferromagnet and non-magnetic bilayers are lacking.
In this work, we report a UMR effect in the antiferromagnetic phase of a Pt/FeRh bilayer. A smooth evolution of UMR with respect to current density and magnetic field suggests that the UMR can be attributed to the interaction between the current-induced spin accumulation and the canting of the individual spin sublattices in FeRh in response to the in-plane field. Our results suggest a route to manipulate and detect the magnetization states in metallic antiferromagnets.
[1] C. O. Avci et al., Nature Physics 11, 570-575 (2015).
[2] K. Yasuda et al., Phys. Rev. Lett. 117, 127202 (2016).

*This work was undertaken as part of the Illinois Materials Research Science and Engineering Center, supported by the National Science Foundation MRSEC program under NSF award number DMR-1720633. Sample growth was supported by the Department of Energy, Office of Science, Materials Science and Engineering Division.

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Presenters

  • Julie Shim

    • Physics, University of Illinois at Urbana-Champaign

Authors

  • Julie Shim

    • Physics, University of Illinois at Urbana-Champaign

  • Hilal Saglam

    • Materials Science Division, Argonne National Laboratory
    • Applied Physics, Yale University
    • Department of Applied Physics, Yale University
    • Yale University

  • Jonathan Gibbons

    • Material Science and Engineering, University of Illinois at Urbana-Champaign
    • Materials Science and Engineering, University of Illinois, Urbana-Champaign, Materials Science, Argonne National Laboratory, Physics, University of California, San Diego
    • Materials Science and Engineering, University of Illinois at Urbana-Champaign

  • Junseok Oh

    • Physics, University of Illinois at Urbana-Champaign

  • Yi Li

    • Materials Science Division, Argonne National Laboratory

  • Wei Zhang

    • Oakland University
    • Physics, Oakland University

  • Shulei Zhang

    • Case Western Reserve University
    • Physics, Case Western Reserve University
    • Department of Physics, Case Western Reserve University

  • Axel F Hoffmann

    • University of Illinois at Urbana-Champaign
    • Material Science and Engineering, University of Illinois at Urbana-Champaign
    • Materials Science and Engineering, University of Illinois, Urbana-Champaign
    • Argonne National Laboratory
    • Materials Science and Engineering, University of Illinois at Urbana-Champaign

  • Joseph N Sklenar

    • Wayne State University
    • Department of Physics and Astronomy, Wayne State University
    • Physics and Astronomy, Wayne State University

  • Nadya Mason

    • University of Illinois at Urbana-Champaign
    • Material Science and Engineering, University of Illinois at Urbana-Champaign
    • Physics, University of Illinois at Urbana-Champaign