Effect of bloch lines on magnetic domain-wall mobility

Abstract

Certain magnetic domain walls in a garnet film show a much reduced mobility from that of normal domain walls in the film and are interpreted to contain vertical Bloch lines. Theory shows that forward wall motion involves sideways propagation of Bloch lines and that in the high Bloch-line density limit, the mobility for small α is reduced to α2 of the conventional value, where α is the Gilbert damping parameter. © 1972 The American Physical Society.