This article is cited in 2 papers

Magnetism

Dynamics of domain walls in magnetically multiaxial films in the thickness range corresponding to the Bloch–Néel transformations of the structure

B. N. Filippov

Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg

Abstract: The numerical minimization of the total energy functional and the solution of the nonlinear Landau–Lifshitz equation have been performed exactly taking into account the fundamental (including dipole-dipole) interactions in terms of the two-dimensional magnetization distribution. The equilibrium structure, energy, mobility, and scenario of the dynamic transformation of the domain walls (in their non-steady-state motion) have been determined as a function of the film thickness $b$ and external magnetic field $H$ for two different ((010) and (110)) orientations of the surfaces of magnetically triaxial films. The range of film thicknesses, including the thickness $b= b_N$, for which the Néel domain walls can be transformed into the Bloch domain walls, has been investigated. The phenomena of anisotropy of the domain-wall energy, the domain-wall mobility, and the period of dynamic transformations of the domain walls have been analyzed as a function of the film thickness $b$ and external magnetic field $H$. The range of film thicknesses has been determined, in which the non-steady-state motion of the Néel domain walls is accompanied by the creation and annihilation of vortex-like structures despite the one-dimensional character of the magnetization distribution in these walls.

Received: 15.05.2012

 English version: Physics of the Solid State, 2012, 54:12, 2407–2415

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