Observation of the unidirectional magnetoresistance in antiferromagnetic insulator Fe2O3/Pt bilayers
Yihong Fan, Pengxiang Zhang, Jiahao Han, Yang Lv, Luqiao Liu, and, Jian-Ping Wang
TL;DR
This paper reports the discovery of unidirectional magnetoresistance in antiferromagnetic Fe2O3/Pt bilayers, highlighting its dependence on interface effects and potential for spintronic applications.
Contribution
First observation of UMR in antiferromagnetic insulator/heavy metal bilayers, expanding understanding of spintronic phenomena in such systems.
Findings
UMR observed in Fe2O3/Pt bilayers
UMR related to interfacial Rashba coupling and band splitting
Thickness-dependent effects suggest competition with USMR
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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Taxonomy
TopicsMagnetic properties of thin films · Physics of Superconductivity and Magnetism · Quantum and electron transport phenomena