Modulating Curie Temperature and Magnetic Anisotropy in Nanoscale-Layered Cr2Te3 Films: Implications for Room-Temperature Spintronics
- Modulating Curie Temperature and Magnetic Anisotropy in Nanoscale-Layered Cr2Te3 Films: Implications for Room-Temperature Spintronics
- 이수연; 최준우; 이인학; 조성원; 이찬기; Byoung Ki Choi; Hyuk Jin Kim; Min Jay Kim; Hu Young Jeong; Jong Hoon Lee; Seung-Young Park; Younghun Jo; Younghak Kim; Beom Hyun Kim; Kyeong Jun Lee; Jin Eun Heo; Seo Hyoung Chang; Fengping Li; Bheema Lingam Chittari; Jeil Jung; Young Jun Chang
- Issue Date
- ACS applied nano materials
- VOL 4, NO 5-4819
- 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.
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