Damping-like spin-orbit torque in Fe3GeTe2/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.

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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