Novel spin-orbit torque generation at room temperature in an all-oxide epitaxial La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub>/SrIrO<sub>3 </sub>system

ORAL

Abstract

An all-oxide, SrTiO3 (STO)// La0.7Sr0.3MnO3 (LSMO)/ SrIrO3 (SIO) heterostructure with lattice-matched crystal structure has been synthesized, exhibiting an epitaxial and atomically-sharp interface between the ferromagnetic LSMO and the high spin-orbit-coupled metal SIO. We use spin-torque ferromagnetic resonance to probe the effective magnetization and the SOT efficiency in LSMO/SIO heterostructures grown on STO substrates. Remarkably, epitaxial LSMO/SIO exhibits a large SOT efficiency, = 1, while retaining a reasonably low shunting factor and enhances the effective magnetization of LSMO by 50 percent. Our findings highlight the significance of epitaxy as a powerful tool to achieve a high SOT efficiency, explore the rich physics at the epitaxial interface, and open up a new pathway for designing next-generation energy-efficient spintronic devices.

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Presenters

  • Xiaoxi Huang

    • University of California, Berkeley

Authors

  • Xiaoxi Huang

    • University of California, Berkeley

  • Shehrin Sayed

    • University of California, Berkeley

  • Joseph Mittelstaedt

    • Cornell University

  • Sandhya Susarla

    • Lawrence Berkeley National Laboratory

  • Saba Karimeddiny

    • Cornell University

  • Lucas Caretta

    • University of California, Berkeley
    • Materials Science and Engineering, University of California, Berkeley

  • Hongrui Zhang

    • University of California, Berkeley

  • Tanay Gosavi

    • Intel Corporation

  • Farzad Mahfouzi

    • Department of Physics and Astronomy, California State University, Northridge
    • Northridge, California State University
    • California State University, Northridge

  • Qilong Sun

    • Northridge, California State University

  • Peter Ercius

    • Lawrence Berkeley National Laboratory
    • University of Michigan

  • Nicholas Kioussis

    • Department of Physics and Astronomy, California State University, Northridge
    • Northridge, California State University
    • Physics and Astronomy, California State University, Northridge
    • Physics, California State University, Northridge
    • California State University, Northridge

  • Sayeef Salahuddin

    • University of California, Berkeley

  • Daniel C Ralph

    • Cornell University

  • Ramamoorthy Ramesh

    • materials science and engineering, university of california berkeley
    • University of California, Berkeley
    • University of California Berkeley
    • UC Berkeley
    • Department of Materials Science and Engineering, University of California Berkley