Review of Wall Creeping in Thin Magnetic Films

Domain wall creeping in thin magnetic Ni-Fe films has been studied as a function of the film thickness, field pulse amplitude, duration and repetition frequency, and bias fields in the hard direction. The experimental results are reviewed and compared with the three existing theories, which ascribe wall creeping to a) Bloch line motion, b) wall structure changes, and c) changing magnetic charges along the walls, respectively. Based on the first theory, methods are indicated by which a reduction of creep sensitivity of magnetic films might be obtained.