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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