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Gigantic Current Control of Coercive Field and Magnetic Memory Based on Nanometer-Thin Ferromagnetic van der Waals Fe3GeTe2

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Title
Gigantic Current Control of Coercive Field and Magnetic Memory Based on Nanometer-Thin Ferromagnetic van der Waals Fe3GeTe2
Author(s)
Kaixuan Zhang; Han, Seungyun; Youjin Lee; Matthew J. Coak; Junghyun Kim; Inho Hwang; Suhan Son; Shin, Jeacheol; Lim, Mijin; Jo, Daegeun; Kim, Kyoo; Kim, Dohun; Lee, Hyun-Woo; Je-Geun Park
Publication Date
2021-01
Journal
ADVANCED MATERIALS, v.33, no.4
Publisher
WILEY-V C H VERLAG GMBH
Abstract
Controlling magnetic states by a small current is essential for the next-generation of energy-efficient spintronic devices. However, it invariably requires considerable energy to change a magnetic ground state of intrinsically quantum nature governed by fundamental Hamiltonian, once stabilized below a phase-transition temperature. Here, it is reported that, surprisingly, an in-plane current can tune the magnetic state of the nanometer-thin van der Waals ferromagnet Fe3GeTe2 from a hard magnetic state to a soft magnetic state. It is a direct demonstration of the current-induced substantial reduction of the coercive field. This surprising finding is possible because the in-plane current produces a highly unusual type of gigantic spin-orbit torque for Fe3GeTe2. In addition, a working model of a new nonvolatile magnetic memory based on the principle of the discovery in Fe3GeTe2, controlled by a tiny current, is further demonstrated. The findings open up a new window of exciting opportunities for magnetic van der Waals materials with potentially huge impact on the future development of spintronic and magnetic memory.
URI
https://pr.ibs.re.kr/handle/8788114/9984
DOI
10.1002/adma.202004110
ISSN
0935-9648
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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