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Observation of the unidirectional magnetoresistance in antiferromagnetic insulator Fe2O3/Pt bilayers

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arxiv 2210.16860 v2 pith:QAKPCJ5A submitted 2022-10-30 cond-mat.mtrl-sci physics.app-ph

Yihong Fan , Pengxiang Zhang , Jiahao Han , Yang Lv , Luqiao Liu , Jian-Ping Wang This is my paper · ORCID
classification cond-mat.mtrl-sciphysics.app-ph
keywords antiferromagneticmagnetoresistanceunidirectionalbilayersfe2o3hallinsulatorspin
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Unidirectional magnetoresistance (UMR) has been observed in a variety of stacks with ferromagnetic/spin Hall material bilayer structures. In this work, we reported UMR in antiferromagnetic insulator Fe2O3/Pt structure. The UMR has a negative value, which is related to interfacial Rashba coupling and band splitting. Thickness-dependent measurement reveals a potential competition between UMR and the unidirectional spin Hall magnetoresistance (USMR). This work revealed the existence of UMR in antiferromagnetic insulators/heavy metal bilayers and broadens the way for the application of antiferromagnet-based spintronic devices.

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