Gweon, Hyung Keun Lee, Sang Yeop Kwon, Hee Young Jeong, Juyoung Chang, Hye Jung Kim, Kyoung-Whan Qiu, Zi Qiang Ryu, Hyejin Jang, Chaun Choi, Jun Woo 2024-01-19T15:30:45Z 2024-01-19T15:30:45Z 2021-09-02 2021-02 1530-6984 https://pubs.kist.re.kr/handle/201004/117384 van der Waals (vdW) magnetic materials provide an ideal platform to study low-dimensional magnetism. However, observations of magnetic characteristics of these layered materials truly distinguishing them from conventional magnetic thin film systems have been mostly lacking. In an effort to investigate magnetic properties unique to vdW magnetic materials, we examine the exchange bias effect, a magnetic phenomenon emerging at the ferromagnetic-antiferromagnetic interface. Exchange bias is observed in the naturally oxidized vdW ferromagnet Fe3GeTe2, owing to an antiferromagnetic ordering in the surface oxide layer. Interestingly, the magnitude and thickness dependence of the effect is unlike those expected in typical thin-film systems. We propose a possible mechanism for this behavior, based on the weak interlayer magnetic coupling inherent to vdW magnets, demonstrating the distinct properties of these materials. Furthermore, the robust and sizable exchange bias for vdW magnets persisting up to relatively high temperatures presents a significant advance for realizing practical two-dimensional spintronics. English American Chemical Society Exchange Bias in Weakly Interlayer-Coupled van der Waals Magnet Fe3GeTe2 Article 10.1021/acs.nanolett.0c04434 1 Nano Letters, v.21, no.4, pp.1672 - 1678 Nano Letters 21 4 1672 1678 N scie scopus 000624334100016 2-s2.0-85101612828 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article exchange bias van der Waals magnets interlayer exchange interaction interfacial magnetism interlayer coupling Fe3GeTe2