Spectrum of 180° Bloch-type domain-wall excitations in yttrium iron garnet

A. V. Mikhailov and I. A. Shimokhin
Phys. Rev. B 48, 9569 – Published 1 October 1993
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Abstract

The spectrum of excitations of a 180° domain wall in a cubic crystal with light uniaxial anisotropy is studied. Numerically, we have found high-frequency branches. The low-frequency (Goldstone) branch of excitations has a square-root long-wavelength singularity in almost all directions of the wave vector. For this branch our asymptotic long-wave expansion gives the angular dependence of the singular contribution.

  • Received 22 October 1991

DOI:https://doi.org/10.1103/PhysRevB.48.9569

©1993 American Physical Society

Authors & Affiliations

A. V. Mikhailov

  • L. D. Landau Institute for Theoretical Physics, Kosygina 2, Moscow 117 940, Russia
  • Institute for Scientific Interchange Foundation, Torino, Italy

I. A. Shimokhin

  • L. D. Landau Institute for Theoretical Physics, Kosygina 2, Moscow 117 940, Russia

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Vol. 48, Iss. 13 — 1 October 1993

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