3-D micromagnetic simulation of a Bloch line between C-sections of a 180° domain wall in a {1 0 0} iron film

Abstract

The micromagnetic structure and energy of a Bloch line (BL) in an asymmetric 180° Bloch domain wall in a 60 nm {1 0 0} iron film have been calculated. In the wall cross-sections on either side of the BL, the flux of magnetisation transverse to that of the domains was ‘C’ shaped, roughly normal to the plane of the film in its interior but bending nearly parallel to the surfaces as they are approached. The sense of this transverse flux is reversed at the BL. The energy of this BL was calculated to be considerably lower than the energies reported earlier for BLs in walls having ‘S’ shaped transverse flux cross-sections.