HIGH-FREQUENCY REPTATION IN FERROMAGNETIC FILMS.

This work is concerned with the snake-like motion of domain walls ( ″streaming″ ) on the excitation of film by nanosecond fields along hard magnetization axis. It is shown that for a leading pulse front of approximately 50 nsec constant field on the hard axis has the same influence as the low-frequency reptation of domain walls. This shows that reptation and streaming of domain walls in thin films are similar in nature. A possible mechanism of domain wall motion is put forward. The demagnetizing fields of a film and the presence of anisotropy dispersion may serve as constantly effective fields in the easy direction.