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arXiv · 2105.01694

Non-local magnon transport in a magnetic domain wall wave guide

Dion M. F. Hartmann·Andreas Rückriegel·Rembert A. Duine
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Abstract

Magnetic domain walls function as a wave guide for low energy magnons. In this paper we develop the theory for the non-local transport of these bound magnons through a ferromagnetic insulator that are injected and detected electrically in adjacent normal metal leads by spin-flip scatting processes and the (inverse) spin-Hall effect. Our set-up requires a twofold degeneracy of the magnetic ground state, which we realize by an easy axis and hard axis anisotropy, in the ferromagnetic insulator. This is readily provided by a broad range of materials. The domain wall is a a topologically protected feature of the system and we obtain the non-local spin transport through it. Thereby we provide a framework for reconfigureable magnonic devices.

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Dion M. F. Hartmann, Andreas Rückriegel, Rembert A. Duine. 2021-05-04. Non-local magnon transport in a magnetic domain wall wave guide. https://doi.org/10.1103/physrevb.104.064434

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