Giant modulation of magnetoresistance in a van der Waals magnet by current-induce phase transition release_rvabzb4h6va3tnbedoanuibtqa

Abstract

<jats:title>Abstract</jats:title> <jats:bold>Efficient magnetization control is a central issue in magnetism and spintronics</jats:bold><jats:sup><jats:bold>1-8</jats:bold></jats:sup><jats:bold>. Particularly, there are increasing demands for versatile manipulation of magnetic states in van der Waals (vdW) magnets for spintronic devices with their unconventional functionalities</jats:bold><jats:sup><jats:bold>9-13</jats:bold></jats:sup><jats:bold>. The electric control of the vdW magnets has been achieved for the magnetization switching via spin torque, but current-induced phase transition between ferromagnetic-to-antiferromagnetic states without external magnetic field is yet to be demonstrated</jats:bold><jats:sup><jats:bold>12,14,15</jats:bold></jats:sup><jats:bold>. Here, we report the current-induced magnetic phase transition in a vdW ferromagnet Fe</jats:bold><jats:sub><jats:bold>5</jats:bold></jats:sub><jats:bold>GeTe</jats:bold><jats:sub><jats:bold>2</jats:bold></jats:sub><jats:bold>, resulting in a giant magnetoresistance. Based on magneto-transport measurements and relevant theoretical analysis, we demonstrate that the transition sequentially occurs through the layers by voltage difference across the vdW gap, induced by an in-plane current. The current-tunability of magnetic phase in Fe</jats:bold><jats:sub><jats:bold>5</jats:bold></jats:sub><jats:bold>GeTe</jats:bold><jats:sub><jats:bold>2</jats:bold></jats:sub><jats:bold> opens a path for electric control of the magnetic properties, expanding our ability to use vdW magnets for diverse spintronic device applications.</jats:bold>
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