Dynamical skyrmions in Heisenberg two-dimensional easy-axis ferromagnets

  • Rocha-Filho G
  • Pereira A
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Abstract

The possibility of existence of dynamical skyrmions with high precession frequency (ω ≥ ω0, where ω0is the resonance frequency) in the two-dimensional classical ferromagnets with easy-axis anisotropy is investigated analytically. The results show that at the resonance frequency, the structure of a skyrmion looks like a vortex having energy increasing logarithmically with the size of the system. For ω > ω0, the skyrmion has a diameter that depends on the competition between the easy-axis anisotropy and the dynamical term. © 2002 Elsevier Science Ltd. All rights reserved.

Author-supplied keywords

  • A. Magnetically ordered materials
  • D. Spin dynamics

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