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Title: Engineering the topological states of Weyl ferromagnetic CoxMnGay films grown by molecular beam epitaxy
Authors: Lizhu Ren 
Zhao, Tieyang 
Chen, Jingsheng 
Teo, Kie Leong 
Issue Date: 25-Apr-2024
Publisher: American Institute of Physics
Citation: Lizhu Ren, Zhao, Tieyang, Chen, Jingsheng, Teo, Kie Leong (2024-04-25). Engineering the topological states of Weyl ferromagnetic CoxMnGay films grown by molecular beam epitaxy. Applied Physics Letters 124 (17). ScholarBank@NUS Repository.
Abstract: Due to its nontrivial topological state, a magnetic Weyl semimetal often exhibits exotic transport properties that are important for both fundamental physics and potential spintronics applications. In this Letter, we investigate the composition dependences of the structural order, magnetism, and transport properties for the epitaxial Heusler alloy CoxMnGay (CMG) topological Weyl semimetal films grown via molecular beam epitaxy. Our results show that the saturated magnetization, anomalous Hall conductivity, and anomalous Hall angle of CMG are influenced by its composition and structural order. Specifically, we observed that the optimized L21–Co2MnGa alloy exhibits a high intrinsic anomalous Hall conductivity of approximately 913 X 1 cm 1 at its maximum, which is attributed to the substantial Berry curvature within its electronic band structures. This study provides valuable insights into how to engineer the topological ferromagnetic state of the Weyl semimetals for future applications.
Source Title: Applied Physics Letters
ISSN: 00036951
DOI: 10.1063/5.0201711
Appears in Collections:Staff Publications

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