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- Title
Wafer‐Scale Epitaxial Growth of the Thickness‐Controllable Van Der Waals Ferromagnet CrTe<sub>2</sub> for Reliable Magnetic Memory Applications.
- Authors
Liu, Xinqi; Huang, Puyang; Xia, Yunyouyou; Gao, Lei; Liao, Liyang; Cui, Baoshan; Backes, Dirk; van der Laan, Gerrit; Hesjedal, Thorsten; Ji, Yuchen; Chen, Peng; Zhang, Yifan; Wu, Fan; Wang, Meixiao; Zhang, Junwei; Yu, Guoqiang; Song, Cheng; Chen, Yulin; Liu, Zhongkai; Yang, Yumeng
- Abstract
To harness the intriguing properties of 2D van der Waals (vdW) ferromagnets (FMs) for versatile applications, the key challenge lies in the reliable material synthesis for scalable device production. Here, the epitaxial growth of single‐crystalline 1T‐CrTe2 thin films on 2‐inch sapphire substrates are demonstrated. Benefiting from the uniform surface energy of the dangling bond‐free Al2O3(0001) surface, the layer‐by‐layer vdW growth mode is observed right from the initial growth stage, which warrants precise control of the sample thickness beyond three monolayer and homogeneous surface morphology across the entire wafer. Moreover, the presence of the Coulomb interaction at the CrTe2/Al2O3 interface plays an important role in tailoring the anomalous Hall response, and the structural optimization of the CrTe2‐based spin‐orbit torque device leads to a substantial switching power reduction by 54%. The results may lay out a general framework for the design of energy‐efficient spintronics based on configurable vdW FMs.
- Subjects
MAGNETICS; FERROMAGNETIC materials; THIN films; SURFACE energy; STRUCTURAL optimization; SAPPHIRES; EPITAXY
- Publication
Advanced Functional Materials, 2023, Vol 33, Issue 50, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.202304454