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Magnon transport in the presence of antisymmetric exchange in a weak antiferromagnet

Ross A, Lebrun R, Gomonay O, Sinova J, Kay A, Grave DA, Rothschild A, Klaeui M (2022)

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Publication Type: Journal article

Publication year: 2022

Journal

Book Volume: 543

Article Number: 168631

DOI: 10.1016/j.jmmm.2021.168631

Abstract

The Dzyaloshinskii-Moriya interaction (DMI) is at the heart of many modern developments in the research field of spintronics. DMI is known to generate noncollinear magnetic textures, and can take two forms in antiferromagnets: homogeneous or inter-sublattice, leading to small, canted moments and inhomogeneous or intra-sublattice, leading to formation of chiral structures. In this work, we first determine the strength of the effective field created by the DMI, using SQUID based magnetometry and transport measurements, in thin films of the antiferromagnetic iron oxide hematite, α-Fe2O3. We demonstrate that DMI additionally introduces reconfigurability in the long distance magnon transport in these films under different orientations of a magnetic field. This arises as a hysteresis centred around the easy-axis direction for an external field rotated in opposing directions whose width decreases with increasing magnetic field as the Zeeman energy competes with the effective field created by the DMI.

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How to cite

APA:

Ross, A., Lebrun, R., Gomonay, O., Sinova, J., Kay, A., Grave, D.A.,... Klaeui, M. (2022). Magnon transport in the presence of antisymmetric exchange in a weak antiferromagnet. Journal of Magnetism and Magnetic Materials, 543. https://doi.org/10.1016/j.jmmm.2021.168631

MLA:

Ross, Andrew, et al. "Magnon transport in the presence of antisymmetric exchange in a weak antiferromagnet." Journal of Magnetism and Magnetic Materials 543 (2022).

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