Giant Modulation of Magnetoresistance in a Van Der Waals Magnet by In‐Plane Current Injection
Abstract
AbstractEfficient magnetization control is a central issue in magnetism and spintronics. Particularly, there are increasing demands for manipulation of magnetic states in van der Waals (vdW) magnets with unconventional functionalities. However, the electrically induced phase transition between ferromagnetic‐to‐antiferromagnetic states without external magnetic field is yet to be demonstrated. Here, the current‐induced magnetic phase transition in a vdW ferromagnet Fe5GeTe2 is reported. Based on magneto‐transport measurements and theoretical analysis, it is demonstrated that transition in the interlayer magnetic coupling occurs through vertical voltage drop between layers induced by current which is attributed to high anisotropy of the resistivity caused by the vdW gaps. Such magnetic phase transition results in giant modulation of the longitudinal magnetoresistance from 5% to 170%. The electrical tunability of the magnetic phase in Fe5GeTe2 with current‐in‐plane geometry opens a path for electric control of magnetic properties, expanding the ability to use vdW magnets for spintronic applications.
Article Details
Authors (22)
Kwangsu Kim
Hyo‐Bin Ahn
SKKU Advanced Institute of Nanotechnology Sungkyunkwan University Suwon 16419 South Korea
Seungho Lee
Institute of Science and Technology Austria (ISTA) , ,
Seyeop Jeong
Department of Physics University of Ulsan Ulsan 44619 South Korea
DongHyeon Lee
Siha Lee
Department of Physics University of Ulsan Ulsan 44619 South Korea
Subin Im
Center for Semiconductor Technology Korea Institute of Science and Technology Seoul Republic of Korea
Seong Been Kim
Sung Jong Kim
Center for Semiconductor Technology Korea Institute of Science and Technology Seoul 02792 South Korea
Jungmin Park
Center for Molecular Spectroscopy and Dynamics
Nyun Jong Lee
Department of Physics University of Ulsan Ulsan 44619 South Korea
Hyun Cheol Koo
Kyongmo An
Quantum Technology Institute Korea Research Institute of Standards and Science Daejeon 34113 Republic of Korea
Kyoung‐Woong Moon
Quantum Technology Institute Korea Research Institute of Standards and Science Daejeon 34113 Republic of Korea
Bongjae Kim
Department of Physics Kyungpook National University Daegu 41566 South Korea
Kyoo Kim
Department of Physics Korea Advanced Institute of Science and Technology Daejeon 34141 South Korea
Kab‐Jin Kim
Department of Physics KAIST Daejeon Republic of Korea
Changgu Lee
SKKU Advanced Institute of Nanotechnology (SAINT) Sungkyunkwan University Suwon 16419 South Korea
Kyoung‐Whan Kim
Department of Physics Yonsei University Seoul 03722 South Korea
Se Kwon Kim
Tae‐Eon Park
Center for Semiconductor Technology Korea Institute of Science and Technology Seoul Republic of Korea
Sanghoon Kim