Interface Engineering of Magnetic Anisotropy in van der Waals Ferromagnet-based Heterostructures
- Interface Engineering of Magnetic Anisotropy in van der Waals Ferromagnet-based Heterostructures
- 구현철; 이기영; 홍석민; 박태언; 김경환; 김덕호; 김성종; 최동원; 서준기; 이창구; 김세권
- van der Waals ferromagnet; Fe3GeTe2; magnetic anisotropy; heterostructure; local interface engineering
- Issue Date
- ACS Nano
- VOL 15, NO 10-16403
- 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.
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