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Controlling vertical magnetization shift by spin-orbit torque in ferromagnetic/antiferromagnetic/ferromagnetic heterostructure

2020-06-28

 

Author(s): Zhou, ZP (Zhou, Z. P.); Liu, XH (Liu, X. H.); Wang, KY (Wang, K. Y.)

Source: APPLIED PHYSICS LETTERS Volume: 116 Issue: 6 Article Number: 062403 DOI: 10.1063/1.5139590 Published: FEB 10 2020

Abstract: We report the control of the vertical magnetization shift (VMS) and exchange bias through spin-orbit torque (SOT) in Pt/Co/Ir25Mn75/Co heterostructure devices. The exchange bias accompanying with a large relative VMS of about 30% is observed after applying a single pulse of 40 mA in a perpendicular field of 2 kOe. Furthermore, the field-free SOT-induced variations of VMS and exchange bias are also observed, which would be related to the effective built-in out-of-plane field due to unequal upward and downward interfacial spin populations. The SOT-induced switched fraction of out-of-plane interfacial spins shows a linear dependence on relative VMS, indicating that the number of uncompensated pinned spins is proportional to the switched interfacial spins. Our finding offers a comprehensive understanding for electrically manipulating interfacial spins of antiferromagnetic materials. Published under license by AIP Publishing.

Accession Number: WOS:000538719000003

Author Identifiers:

Author        Web of Science ResearcherID        ORCID Number

Liu, Xionghua                  0000-0003-1237-2787

ISSN: 0003-6951

eISSN: 1077-3118

Full Text: https://aip.scitation.org/doi/10.1063/1.5139590



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