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원자제어 저차원 전자계 연구단
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Nearly room temperature ferromagnetism in a magnetic metal-rich van der Waals metal

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Title
Nearly room temperature ferromagnetism in a magnetic metal-rich van der Waals metal
Author(s)
Junho Seo; Kim, Duck Young; Eun Su An; Kim, Kyoo; Kim, Gi-Yeop; Hwang, Soo-Yoon; Kim, Dong Wook; Jang, Bo Gyu; Kim, Heejung; Eom, Gyeongsik; Seung Young Seo; Roland Stania; Muntwiler, Matthias; Jinwon Lee; Watanabe, Kenji; Taniguchi, Takashi; Jo, Youn Jung; Lee, Jieun; Min, Byung Il; Moon Ho Jo; Han Woong Yeom; Choi, Si-Young; Shim, Ji Hoon; Jun Sung Kim
Subject
CRYSTAL-STRUCTURES, ; GRAPHENE, ; RELAXATION, ; TELLURIDE
Publication Date
2020-01
Journal
SCIENCE ADVANCES, v.6, no.3, pp.eaay8912
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Abstract
© 2020 The Authors. In spintronics, two-dimensional van der Waals crystals constitute a most promising material class for long-distance spin transport or effective spin manipulation at room temperature. To realize all-vdW-material–based spintronic devices, however, vdW materials with itinerant ferromagnetism at room temperature are needed for spin current generation and thereby serve as an effective spin source. We report theoretical design and experimental realization of a iron-based vdW material, Fe4GeTe2, showing a nearly room temperature ferromagnetic order, together with a large magnetization and high conductivity. These properties are well retained even in cleaved crystals down to seven layers, with notable improvement in perpendicular magnetic anisotropy. Our findings highlight Fe4GeTe2 and its nanometer-thick crystals as a promising candidate for spin source operation at nearly room temperature and hold promise to further increase Tc in vdW ferromagnets by theory-guided material discovery
URI
https://pr.ibs.re.kr/handle/8788114/8736
DOI
10.1126/sciadv.aay8912
ISSN
2375-2548
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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