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One-dimensional dynamics of domain walls in a three-layer ferromagnetic structure with different parameters of magnetic anisotropy and exchange of the layers

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Abstract

The one-dimensional nonlinear dynamics of a domain wall under the effect of an external dc magnetic field in three-layer ferromagnets with different values of the parameters of magnetic anisotropy and exchange in the layers has been studied theoretically. Equations of motion for the coordinate of the center of a domain wall and for the velocity of its motion after passage from one layer into another has been found using perturbation-theory methods. It is shown that, in the case of small defects, the analytical results agree well with the numerical results. The minimum velocity required for a domain wall to pass from one layer into another has been found numerically as a function of the parameters of the material.

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Authors and Affiliations

  1. Bashkir State University, ul. Validi 32, Ufa, 450076, Russia

    E. G. Ekomasov & R. R. Murtazin

  2. Institute of Molecule and Crystal Physics, Ufa Research Center, Russian Academy of Sciences, pr. Oktyabrya 151, Ufa, 450075, Russia

    V. N. Nazarov

Authors
  1. E. G. Ekomasov
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  2. R. R. Murtazin
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  3. V. N. Nazarov
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Correspondence to E. G. Ekomasov.

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Original Russian Text © E.G. Ekomasov, R.R. Murtazin, V.N. Nazarov, 2014, published in Fizika Metallov i Metallovedenie, 2014, Vol. 115, No. 2, pp. 125–131.

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Ekomasov, E.G., Murtazin, R.R. & Nazarov, V.N. One-dimensional dynamics of domain walls in a three-layer ferromagnetic structure with different parameters of magnetic anisotropy and exchange of the layers. Phys. Metals Metallogr. 115, 117–123 (2014). https://doi.org/10.1134/S0031918X14020069

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  • DOI: https://doi.org/10.1134/S0031918X14020069

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