Enhancement of coercive field in atomically-thin quenched Fe5GeTe2

We have fabricated thin films of a van der Waals (vdW) ferromagnetic metal Fe5GeTe2 and characterized them by measuring the anomalous Hall effect. While the bulk Fe5GeTe2 does not exhibit a perpendicular magnetic anisotropy (PMA) unlike Fe3GeTe2, PMA emerges in the thin film devices. Furthermore, th...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics express 2020-03, Vol.13 (4)
Main Authors: Ohta, Tomoharu, Sakai, Kosuke, Taniguchi, Hiroki, Driesen, Benjamin, Okada, Yoshinori, Kobayashi, Kensuke, Niimi, Yasuhiro
Format: Article
Language:English
Subjects:
anomalous Hall effect
perpendicular magnetic anisotropy
van der Waals materials
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have fabricated thin films of a van der Waals (vdW) ferromagnetic metal Fe5GeTe2 and characterized them by measuring the anomalous Hall effect. While the bulk Fe5GeTe2 does not exhibit a perpendicular magnetic anisotropy (PMA) unlike Fe3GeTe2, PMA emerges in the thin film devices. Furthermore, the PMA is enhanced with decreasing thickness of Fe5GeTe2. In particular, a thin film (5 unit-cell layer) device fabricated with Fe5GeTe2 quenched at 1050 K has two times larger coercive field than that prepared without quenching. Such a PMA should be useful for future vdW spintronic devices.
ISSN:1882-0778
1882-0786
DOI:10.35848/1882-0786/ab7f18