Nonlocal spin transport in antiferromagnet Cr<sub>2</sub>O<sub>3</sub> thin film

ORAL

Abstract

Cr2O3 is an interesting insulating antiferromagnetic material, which has been widely investigated recently, including in the electric field control of the exchange bias and spin Seebeck effect. In our study, high quality Cr2O3 films are epitaxially grown on the substrates of (0001) Al2O3 using high vacuum pulsed laser deposition. The layer by layer growth is monitored by the in-situ reflection high energy electron reflection oscillations, and atomic force microscope result shows the surface is atomically flat. The spin transport on the thin films is probed by using the nonlocal spin transport geometry with two parallel electrodes via the standard low frequency lock-in technique. Temperature and magnetic field dependences of the nonlocal spin signal are systematically studied. Interestingly, the nonlocal signal can be observed even at a spacing distance of 20 μm, demonstrating the potential of insulating antiferromagnet for the long distance spin transport.

*National Basic Research Programs of China
National Natural Science Foundation of China

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Presenters

  • Wei Yuan

    • Peking University
    • Physics, Peking University

Authors

  • Wei Yuan

    • Peking University
    • Physics, Peking University

  • Qiong Zhu

    • Peking University

  • Tang Su

    • Peking University
    • Physics, Univ of California - Riverside

  • Yunyan Yao

    • Peking University
    • Physics, Peking University

  • Yang Ma

    • Peking University

  • Xi Lin

    • Peking University
    • Peking Univ

  • Jing Shi

    • Univ of California - Riverside
    • Physics and Astronomy, University of Calirfornia, Riverside
    • University of California, Riverside
    • Physics, Univ of California - Riverside
    • Physics and Astronomy Department, University of California Riverside

  • Ryuichi Shindou

    • International Center for Quantum Materials, Peking University
    • Peking University
    • International Center for Quantum Materials, Peking Univ

  • Xincheng Xie

    • International Center for Quantum Materials and School of Physics, Peking University
    • Peking University
    • International Center for Quantum Materials, Peking University
    • International Center for Quantum Materials, School of Physics, Peking University
    • Peking Univ

  • Wei Han

    • Peking Univ
    • Peking University
    • Physics, Peking University