Voltage Control of the Magnetic Anisotropy in Fe<sub>2.7</sub>GeTe<sub>2</sub>/In<sub>2</sub>Se<sub>3</sub> van der Waals Heterostructures

ORAL

Abstract

The discovery of van der Waals (vdW) materials has introduced unique opportunities to design unexplored heterostructures by mechanical exfoliation and transfer of various vdW materials. In this work, we fabricate a heterostructure device consisting of vdW ferromagnetic Fe2.7GeTe2 (FGT) and vdW piezoelectric/ferroelectric α-In2Se3 (IS), and observe the FGT magnetic properties as it is voltage-gated by the IS layer. Our magneto-optical Kerr effect (MOKE) measurement shows that the gate voltage can manipulate the magnetic coercivity of FGT, confirming the magnetoelectric interaction between the FGT and IS. The change in FGT magnetic coercivity and anisotropy is attributed to the voltage-controlled strain on the FGT by our Raman spectroscopy and density functional theory (DFT) calculation. Our results pave a way for low-power voltage-driven vdW spintronic devices.

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Presenters

  • Jaeun Eom

    • Korea Institute of Science & Technology (KIST)

Authors

  • Jaeun Eom

    • Korea Institute of Science & Technology (KIST)

  • Jin Hong Lee

    • Korea Institute of Science & Technology (KIST)

  • INHAK LEE

    • Korea Institute of Science and Technology

  • Jung Yun Kee

    • Korea Institute of Science & Technology (KIST)
    • Korea Institute of Science and Technology

  • Minhyun Cho

    • Kyung Hee University
    • Kyung Hee University (KHU)

  • Hoyoung Suh

    • Korea Institute of Science & Technology (KIST)
    • Korea Institute of Science and Technology

  • Yu Liu

    • Brookhaven National Lab

  • Hye Jung Chang

    • Korea Institute of Science & Technology (KIST)
    • Korea Institute of Science and Technology

  • Cedomir Petrovic

    • Brookhaven National Laboratory

  • Hyejin Ryu

    • Korea Institute of Science and Technolog
    • Korea Institute of Science & Technology (KIST)

  • Chaun jang

    • Korea Institute of Science and Technology
    • Korea Institute of Science & Technology (KIST)

  • Young Duck Kim

    • Kyung Hee University

  • Dohun Kim

    • Seoul National University
    • Seoul National University (SNU)

  • Se Young Park

    • Soongsil University

  • Jun Woo Choi

    • Korea Institute of Science and Technology
    • Korea Institute of Science & Technology (KIST)