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arXiv · 1702.02248

Annihilation of Domain Walls in a Ferromagnetic Wire

Anirban Ghosh·Kevin S. Huang·Oleg Tchernyshyov
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Abstract

We study the annihilation of topological solitons in the simplest setting: a one-dimensional ferromagnet with an easy axis. We develop an effective theory of the annihilation process in terms of four collective coordinates: two zero modes of the translational and rotational symmetries $Z$ and $Φ$, representing the average position and azimuthal angle of the two solitons, and two conserved momenta $ζ$ and $φ$, representing the relative distance and twist. Comparison with micromagnetic simulations shows that our approach captures well the essential physics of the process.

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Anirban Ghosh, Kevin S. Huang, Oleg Tchernyshyov. 2017-02-08. Annihilation of Domain Walls in a Ferromagnetic Wire. https://doi.org/10.1103/physrevb.95.180408

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