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arXiv · 2210.16860

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

Yihong Fan·Pengxiang Zhang·Jiahao Han·Yang Lv·Luqiao Liu·Jian-Ping Wang
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Abstract

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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Yihong Fan, Pengxiang Zhang, Jiahao Han, Yang Lv, Luqiao Liu, Jian-Ping Wang. 2022-10-30. Observation of the unidirectional magnetoresistance in antiferromagnetic insulator Fe2O3/Pt bilayers. https://arxiv.org/abs/2210.16860

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