Lx. Jia et al., THE ROLE OF VORTICES IN THE MAGNETIZATION PROCESS OF SMALL DIMENSION PERMALLOY-FILMS, IEEE transactions on magnetics, 32(5), 1996, pp. 4222-4224
A micromagnetic model has been developed for small dimensional permall
oy films, such as those being considered for high density recording. T
he results show that variations in the magnetization occur through the
formation of vortices which give rise to Barkhausen noise in the tran
sfer curve.