Damping-like spin-orbit torque in Fe<sub>3</sub>GeTe<sub>2</sub>/Pt heterostructures

ORAL

Abstract

Van der Waals (vdW) layered ferromagnets have become a hot topic of research lately within the two-dimensional materials community due to the ability to study magnetic properties from a single atomic layer. Fe3GeTe2 (FGT) is one of very few known metallic members of the vdW ferromagnetic materials family. It has strong perpendicular magnetic anisotropy (PMA) and Curie temperature, TC ~ 220 K, which makes FGT a good candidate material to study the effect of spin-orbit torque (SOT) on the magnetization of 2D ferromagnet in FGT/heavy metal heterostructures. For this study we fabricated heterostructures of FGT/Pt with 5 nm of Pt sputtered onto the surface of ~ 15 nm – 50 nm flakes of FGT. We measured the first and second harmonic Hall responses to an applied magnetic field in the in-plane parallel and perpendicular to current directions. We also measured the angular dependence of the 2 ω signal with fixed in-plane fields larger than the field required to saturate the magnetization in the hard axis direction. Our analysis of the 2 ω signals show that damping-like SOT is at least an order of magnitude greater than the negligible field-like SOT and thus it is the dominant mechanism acting on the magnetization of FGT.

*This work was supported by DOE (USA) BES Award No. DE-FG02-07ER46351.

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Presenters

  • Mohammed Alghamdi

    • University of California, Riverside
    • Department of Physics and Astronomy, University of California, Riverside

Authors

  • Mohammed Alghamdi

    • University of California, Riverside
    • Department of Physics and Astronomy, University of California, Riverside

  • Mark Lohmann

    • University of California, Riverside
    • Department of Physics and Astronomy, University of California, Riverside

  • Junxue Li

    • University of California, Riverside
    • Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA
    • Physics and Astronomy, University of California, Riverside
    • Department of Physics and Astronomy, University of California, Riverside
    • Physics and Astronomy, UC riverside

  • Tang Su

    • Physics and Astronomy, University of California, Riverside
    • International Center for Quantum Materials, Peking University
    • International Center for Quantum Materials, School of Physics, Peking University
    • School of Physics, Peking University

  • Kenji Watanabe

    • National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305 0044, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science, , 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044
    • National Institute of Materials Science
    • NIMS, Japan
    • Advanced Materials Laboratory, NIMS
    • National Institute for Materials Science, Tsukuba, Japan
    • National Institute for Materials Science, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science
    • National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0044, Japan
    • National Institute for Materials Science (NIMS)
    • NIMS Tsukuba
    • National Institute for Materials Science (Japan)
    • NIMS
    • National Institute for Material Science
    • National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan
    • National Institute for Materials Science , Japan
    • National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan.
    • Advanced Materials Laboratory, National Institute for Materials Science, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
    • National Institute for Materials Science, Tsukuba, Ibaraki 305- 0044, Japan
    • National Institute for Material Science - Japan
    • National Institute for Materials Science, Namiki Tsukuba Ibaraki, Japan
    • National Institute of Material Science
    • Advanced Material Lab, NIMS
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
    • National Institute for Materials Science, Tsukuba
    • 1-1 Namiki, Tsukuba, National Institute for Materials Science
    • NIMS/Tsukuba
    • National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044 Japan
    • National Institute for Materials Science, Namiki, 305-0044, Japan
    • National Institute for Material Science, Japan
    • Advanced Materials Laboratory, NIMS, Japan
    • Columbia University
    • Advanced Materials Labaratory, National Institute for Materials Science
    • National Institute of Material Science, 1-1 Namiki, Tsukuba, Ibaraki 205-0044, Japan
    • National Institute of Materials Science, Japan

  • Takashi Taniguchi

    • National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305 0044, Japan
    • National Institute for Materials Science
    • Advanced Materials Laboratory, National Institute for Materials Science, , 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044
    • National Institute of Materials Science
    • NIMS, Japan
    • Advanced Materials Laboratory, NIMS
    • National Institute for Materials Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science
    • National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0044, Japan
    • National Institute for Materials Science (NIMS)
    • NIMS Tsukuba
    • NIMS
    • National Institute for Material Science
    • National Institute for Materials Science, Japan
    • National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan
    • National Institute for Materials Science , Japan
    • Advanced Materials Laboratory, National Institute for Materials Science, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
    • National Institute for Materials Science, Tsukuba, Ibaraki 305- 0044, Japan
    • National Institute for Material Science - Japan
    • National Institute for Materials Science, Namiki Tsukuba Ibaraki, Japan
    • National Institute of Material Science
    • Advanced Material Lab, NIMS
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Japan
    • Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
    • National Institute for Materials Science, Tsukuba
    • 1-1 Namiki, Tsukuba, National Institute for Materials Science
    • NIMS/Tsukuba
    • National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044 Japan
    • National Institute for Materials Science, Namiki, 305-0044, Japan
    • National Institute for Material Science, Japan
    • Advanced Materials Laboratory, NIMS, Japan
    • Advanced Materials Labaratory, National Institute for Materials Science
    • National Institute of Material Science, 1-1 Namiki, Tsukuba, Ibaraki 205-0044, Japan
    • National Institute of Materials Science, Japan

  • Palani Raja Jothi

    • Department of Chemistry, University of California, Riverside

  • Boniface Fowka

    • Department of Chemistry, University of California, Riverside

  • Jing Shi

    • Department of Physics and Astronomy, University of California, Riverside
    • University of California, Riverside