Spin-orbit torque switching of an antiferromagnetic metallic heterostructure

Samik DuttaGupta (), A. Kurenkov, Oleg A. Tretiakov, G. Krishnaswamy, G. Sala, V. Krizakova, F. Maccherozzi, S. S. Dhesi, P. Gambardella, S. Fukami and H. Ohno
Additional contact information
Samik DuttaGupta: Tohoku University
A. Kurenkov: Tohoku University
Oleg A. Tretiakov: The University of New South Wales
G. Krishnaswamy: ETH Zurich
G. Sala: ETH Zurich
V. Krizakova: ETH Zurich
F. Maccherozzi: Diamond Light Source, Chilton
S. S. Dhesi: Diamond Light Source, Chilton
P. Gambardella: ETH Zurich
S. Fukami: Tohoku University
H. Ohno: Tohoku University

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract The ability to represent information using an antiferromagnetic material is attractive for future antiferromagnetic spintronic devices. Previous studies have focussed on the utilization of antiferromagnetic materials with biaxial magnetic anisotropy for electrical manipulation. A practical realization of these antiferromagnetic devices is limited by the requirement of material-specific constraints. Here, we demonstrate current-induced switching in a polycrystalline PtMn/Pt metallic heterostructure. A comparison of electrical transport measurements in PtMn with and without the Pt layer, corroborated by x-ray imaging, reveals reversible switching of the thermally-stable antiferromagnetic Néel vector by spin-orbit torques. The presented results demonstrate the potential of polycrystalline metals for antiferromagnetic spintronics.

Date: 2020
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DOI: 10.1038/s41467-020-19511-4

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