Interface Engineering of Magnetic Anisotropy in van der Waals Ferromagnet-based Heterostructures

Title
Interface Engineering of Magnetic Anisotropy in van der Waals Ferromagnet-based Heterostructures
Authors
구현철이기영홍석민박태언김경환김덕호김성종최동원서준기이창구김세권
Keywords
van der Waals ferromagnet; Fe3GeTe2; magnetic anisotropy; heterostructure; local interface engineering
Issue Date
2021-10
Publisher
ACS Nano
Citation
VOL 15, NO 10-16403
Abstract
Interface engineering is an effective approach to tune the magnetic properties of van der Waals (vdW) magnets and their heterostructures. The prerequisites for the practical utilization of vdW magnets and heterostructures are a quantitative analysis of their magnetic anisotropy and the ability to modulate their interfacial properties, which have been challenging to achieve with conventional methods. Here we characterize the magnetic anisotropy of Fe3GeTe2 layers by employing the magnetometric technique based on anomalous Hall measurements and confirm its intrinsic nature. In addition, on the basis of the thickness dependences of the anisotropy field, we identify the interfacial and bulk contributions. Furthermore, we demonstrate that the interfacial anisotropy in Fe3GeTe2-based heterostructures is locally controlled by adjacent layers, leading to the realization of multiple magnetic behaviors in a single channel. This work proposes that the magnetometric technique is a useful platform for investigating the intrinsic properties of vdW magnets and that functional devices can be realized by local interface engineering.
URI
http://pubs.kist.re.kr/handle/201004/73960
ISSN
1936-0851
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KIST Publication > Article
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