Spin Hall magnetoresistance in Pt/hexagonal rare-earth ferrite heterostructures

ORAL

Abstract

Multiferroic materials are promising for spintronic application due to their strongly coupled ferroic orders. Hexagonal rare-earth ferrites (h-RFeO3) possess ferroelectric and anti-ferromagnetic orders that could modify spin-charge conversion with a large electric polarization. We report measurements of field-dependent and angle-dependent magnetoresistance from Pt/h-RFeO3 heterostructures at various temperatures. It is found that spin Hall magnetoresistance (SMR) and anisotropic magnetoresistance (AMR) coexist in the bilayers. SMR has a temperature dependence similar with those from Pt/ferromagnetic insulators, but the temperature dependence of AMR reaches local maximum around Neel temperature of h-RFeO3 and changes sign at lower temperatures. The results are discussed within the frame of SMR theory by considering the magnetocrystalline anisotropy of h-RFeO3.

*This research was primarily supported by US DOE (DE-SC0019173).

–

Presenters

  • Jing Li

    • University of Nebraska - Lincoln

Authors

  • Jing Li

    • University of Nebraska - Lincoln

  • Yu Yun

    • Physics & Astronomy, University of Nebraska-Lincoln
    • University of Nebraska - Lincoln

  • Xiaoshan Xu

    • Physics & Astronomy, University of Nebraska-Lincoln
    • Nebraska Center for Materials and Nanoscience and Department of Physics and Astronomy, University of Nebraska - Lincoln
    • University of Nebraska-Lincoln
    • University of Nebraska - Lincoln
    • Department of Physics and Astronomy, University of Nebraska - Lincoln
    • Physics and Astronomy, University of Nebraska-Lincoln