Modulating Curie Temperature and Magnetic Anisotropy in Nanoscale-Layered Cr2Te3 Films: Implications for Room-Temperature Spintronics

Title
Modulating Curie Temperature and Magnetic Anisotropy in Nanoscale-Layered Cr2Te3 Films: Implications for Room-Temperature Spintronics
Authors
이수연최준우이인학조성원이찬기Byoung Ki ChoiHyuk Jin KimMin Jay KimHu Young JeongJong Hoon LeeSeung-Young ParkYounghun JoYounghak KimBeom Hyun KimKyeong Jun LeeJin Eun HeoSeo Hyoung ChangFengping LiBheema Lingam ChittariJeil JungYoung Jun Chang
Keywords
Cr2Te3
Issue Date
2021-05
Publisher
ACS applied nano materials
Citation
VOL 4, NO 5-4819
Abstract
Nanoscale-layered ferromagnets have demonstrated fascinating two-dimensional magnetism down to atomic layers, providing a peculiar playground of spin orders for investigating fundamental physics and spintronic applications. However, the strategy for growing films with designed magnetic properties is not well established yet. Herein, we present a versatile method to control the Curie temperature (TC) and magnetic anisotropy during the growth of ultrathin Cr2Te3 films. We demonstrate an increase of the TC from 165 to 310 K in sync with magnetic anisotropy switching from an out-of-plane orientation to an in-plane one, respectively, via controlling the Te source flux during film growth, leading to different c-lattice parameters while preserving the stoichiometries and thicknesses of the films. We attributed this modulation of magnetic anisotropy to the switching of the orbital magnetic moment, using X-ray magnetic circular dichroism analysis. We also inferred that different c-lattice constants might be responsible for the magnetic anisotropy change, supported by theoretical calculations. These findings emphasize the potential of ultrathin Cr2Te3 films as candidates for developing room-temperature spintronics applications, and similar growth strategies could be applicable to fabricate other nanoscale layered magnetic compounds.
URI
http://pubs.kist.re.kr/handle/201004/73368
ISSN
2574-0970
Appears in Collections:
KIST Publication > Article
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