Anisotropic long-range spin transport in canted antiferromagnetic orthoferrite YFeO3

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Abstract

In antiferromagnets, the efficient transport of spin-waves has until now only been observed in the insulating antiferromagnet hematite, where circularly (or a superposition of pairs of linearly) polarized spin-waves diffuse over long distances. Here, we report long-distance spin-transport in the antiferromagnetic orthoferrite YFeO3, where a different transport mechanism is enabled by the combined presence of the Dzyaloshinskii-Moriya interaction and externally applied fields. The magnon decay length is shown to exceed hundreds of nanometers, in line with resonance measurements that highlight the low magnetic damping. We observe a strong anisotropy in the magnon decay lengths that we can attribute to the role of the magnon group velocity in the transport of spin-waves in antiferromagnets. This unique mode of transport identified in YFeO3 opens up the possibility of a large and technologically relevant class of materials, i.e., canted antiferromagnets, for long-distance spin transport.

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Das, S., Ross, A., Ma, X. X., Becker, S., Schmitt, C., van Duijn, F., … Kläui, M. (2022). Anisotropic long-range spin transport in canted antiferromagnetic orthoferrite YFeO3. Nature Communications, 13(1). https://doi.org/10.1038/s41467-022-33520-5

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