3-D micromagnetic simulation of a Bloch line between C-sections of a 180 degrees domain wall in a {100} iron film

The micromagnetic structure and energy of a Bloch line (BL) in an asymmetri c 180 degrees Bloch domain wall in a 60 nm (100) iron film have been calcul ated In the wall cross-sections on either side of the BL, the flux of magne tisation transverse to that of the domains was 'C' shaped, roughly normal t o 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 rever sed at the BL. The energy of this BL was calculated to be considerably lowe r than the energies reported earlier for BLs in walls having 'S' shaped tra nsverse flux cross-sections. (C) 2000 Elsevier Science B.V. All rights rese rved.