Simulation of three-dimensional micromagnetic structures in magnetically uniaxial films with in-plane anisotropy. Dynamics and structural reconstructions

Abstract

Abstract-Transition processes in nonequilibrium micromagnetic structures that represent regions of various types of asymmetrical vortex domain walls with closely spaced transition structural elements, including vertical Bloch lines (VBLs), singular points, and clusters consisting of VBLs and singular points, have been studied by the method of three dimensional numerical simulation of the magnetization behavior. The realization of vari ous scenarios of dynamic behavior, including the annihilation of transition elements accompanied by the liber ation of energy and the initiation of wave processes, has been shown to be possible. The simulation was per formed for the case of magnetically uniaxial ferromagnetic films with an easy axis parallel to their surface with exact allowance for the inhomogeneous exchange, magnetoanisotropic, and magnetostatic interactions.