Author(s): Zhang, EZ (Zhang, E. Z.); Deng, YC (Deng, Y. C.); Liu, XH (Liu, X. H.); Zhan, XZ (Zhan, X. Z.); Zhu, T (Zhu, T.); Wang, KY (Wang, K. Y.)

Source: PHYSICAL REVIEW B Volume: 104 Issue: 13 Article Number: 134408 DOI: 10.1103/PhysRevB.104.134408 Published: OCT 12 2021

Abstract: We systematically investigated the manipulation of antiferromagnetic interfacial states through current-induced spin-orbit torques (SOT) in the Pt/Co/Ir25Mn75(Ir-Mn) system with varying Ir-Mn or Co thickness. The high tunability of antiferromagnetic interfacial states, that the antiferromagnetic interfacial spins gradually switched from upward to downward or vice versa by SOT, was achieved for the samples with t(IrMn) >= 4nm, whereas the switching ability of antiferromagnetic interfacial spins via SOT under a perpendicular field or a longitudinal field was different, which was attributed to the influence from partial canted interfacial spins. Moreover, the interfacial spins of Ir-Mn layer can be also effectively tuned by SOT across Ru layer in the Pt/Co/Ru/Ir-Mn system, where the exchange coupling between Co and Ir-Mn decreased with increasing the thickness of the Ru layer. Our work provides a comprehensive understanding for manipulating antiferromagnetic interfacial states via SOT, which will promote innovative designs for antiferromagnetic spintronic devices.

Accession Number: WOS:000707469100004

ISSN: 2469-9950

eISSN: 2469-9969

Full Text: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.104.134408