Antiferromagnetic anisotropy determination by spin Hall magnetoresistance

Hua Wang, Dazhi Hou, Zhiyong Qiu, Takashi Kikkawa, Eiji Saitoh, Xiaofeng Jin

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14 Citations (Scopus)

Abstract

An electric method for measuring magnetic anisotropy in antiferromagnetic insulators (AFIs) is proposed. When a metallic film with strong spin-orbit interactions, e.g., platinum (Pt), is deposited on an AFI, its resistance should be affected by the direction of the AFI Néel vector due to the spin Hall magnetoresistance (SMR). Accordingly, the direction of the AFI Néel vector, which is affected by both the external magnetic field and the magnetic anisotropy, is reflected in resistance of Pt. The magnetic field angle dependence of the resistance of Pt on AFI is calculated by considering the SMR, which indicates that the antiferromagnetic anisotropy can be obtained experimentally by monitoring the Pt resistance in strong magnetic fields. Calculations are performed for realistic systems such as Pt/Cr2O3, Pt/NiO, and Pt/CoO.

Original languageEnglish
Article number083907
JournalJournal of Applied Physics
Volume122
Issue number8
DOIs
Publication statusPublished - 2017 Aug 28

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Wang, H., Hou, D., Qiu, Z., Kikkawa, T., Saitoh, E., & Jin, X. (2017). Antiferromagnetic anisotropy determination by spin Hall magnetoresistance. Journal of Applied Physics, 122(8), [083907]. https://doi.org/10.1063/1.4986372