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Nonlinear dynamics of domain walls with cross-ties

  • Order, Disorder, and Phase Transition in Condensed System
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Abstract

The dynamic behavior of a domain wall with cross-ties is analyzed on the basis of micromagnetic simulation with exact allowance for all main (exchange, magnetoanisotropic, and magnetostatic) interactions in thin magnetically uniaxial ferromagnetic films with planar anisotropy. It is found that the peculiarities of motion of such domain walls are closely related to the behavior of topological defects in the magnetization distribution (generation, motion, and annihilation of vortex–antivortex pairs on the film surface and Bloch points). We observe three different regimes of motion (stationary, periodic, and turbulent regimes), each of which is realized in a certain range of fields oriented along the easy magnetization axis. It is shown that the experimentally observed dynamic bends of the walls with cross-ties are determined by the type of motion of vortices and antivortices. The velocities of domain walls in different regimes are calculated, and the dynamic configurations of the magnetization and existing dynamic transitions between them are investigated.

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Authors and Affiliations

  1. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620990, Russia

    M. N. Dubovik & B. N. Filippov

  2. Ural Federal University, Yekaterinburg, 620002, Russia

    M. N. Dubovik, V. V. Zverev & B. N. Filippov

Authors
  1. M. N. Dubovik
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  2. V. V. Zverev
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  3. B. N. Filippov
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Correspondence to M. N. Dubovik.

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Original Russian Text © M.N. Dubovik, V.V. Zverev, B.N. Filippov, 2016, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2016, Vol. 150, No. 1, pp. 122–134.

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Dubovik, M.N., Zverev, V.V. & Filippov, B.N. Nonlinear dynamics of domain walls with cross-ties. J. Exp. Theor. Phys. 123, 108–118 (2016). https://doi.org/10.1134/S1063776116050162

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  • DOI: https://doi.org/10.1134/S1063776116050162

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