Efficient spin torques in antiferromagnetic CoO/Pt quantified by comparing field- and current- induced switching

We achieve current-induced switching in collinear insulating antiferromagnetic CoO/Pt, with fourfold in-plane magnetic anisotropy. This is measured electrically by spin Hall magnetoresistance and confirmed by the magnetic field-induced spin-flop transition of the CoO layer. By applying current pulse...

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Bibliographic Details
Published in:arXiv.org 2021-02
Main Authors: Baldrati, Lorenzo, Schmitt, Christin, Gomonay, Olena, Lebrun, Romain, Ramos, Rafael, Saitoh, Eiji, Sinova, Jairo, Kläui, Mathias
Format: Article
Language:English
Subjects:
Antiferromagnetism
Current pulses
Equivalence ratio
Magnetic anisotropy
Magnetic fields
Magnetism
Magnetoresistance
Magnetoresistivity
Switching
Torque
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Summary:We achieve current-induced switching in collinear insulating antiferromagnetic CoO/Pt, with fourfold in-plane magnetic anisotropy. This is measured electrically by spin Hall magnetoresistance and confirmed by the magnetic field-induced spin-flop transition of the CoO layer. By applying current pulses and magnetic fields, we quantify the efficiency of the acting current-induced torques and estimate a current-field equivalence ratio of \(4x10^{-11} T A^{-1} m^2\). The Néel vector final state (\(n \perp j\)) is in line with a thermomagnetoelastic switching mechanism for a negative magnetoelastic constant of the CoO.
ISSN:2331-8422
DOI:10.48550/arxiv.2003.05923