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Physics of the Solid State

, Volume 61, Issue 11, pp 2041–2054 | Cite as

Dynamic Rearrangements of a Three-Dimensional Topological Structure of a Moving Domain Wall in Magnetic Film in the Presence of Random Perturbations

  • V. V. ZverevEmail author
  • E. Zh. Baikenov
  • I. M. Izmozherov
MAGNETISM
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Abstract

Using three-dimensional micromagnetic simulation, the dynamic processes occurring in a domain wall (DW) that moves under the influence of a constant magnetic field in a magnetically soft uniaxial film with planar anisotropy are studied. It is shown that the general picture of the dynamics of topological transformations taking place in DWs can significantly vary with the introduction of perturbing factors that randomly depend on the coordinates or time (spatially heterogeneous anisotropy; a magnetic field fluctuating in time). Moreover, the characteristic configurations of a vector magnetization field near the intrafilm vortex cores and singular (Bloch) points preserve their shape. The dependences of the energy and DW shifts on the time are determined for a wide range of film thickness values, temperatures, and magnetic field intensities. Imaging techniques based on calculating two types of topological charges are used when analyzing magnetization configurations.

Keywords:

magnetic films micromagnetism domain walls 

Notes

FUNDING

This work was performed within the State Assignment from the Ministry of Education and Science of the Russian Federation (topic Alloys) with financial support in accordance with order no. 211 of the Russian Government (contract no. 02.A03.21.0006).

CONFLICT OF INTEREST

The authors declare that they have no conflicts of interest.

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • V. V. Zverev
    • 1
    • 2
    Email author
  • E. Zh. Baikenov
    • 1
  • I. M. Izmozherov
    • 1
    • 2
  1. 1.Ural Federal UniversityYekaterinburgRussia
  2. 2.Mikheev Institute of Metal Physics, Russian Academy of SciencesYekaterinburgRussia

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