Formation of the nanodots and change of the characteristics of thin magnetic films under laser irradiation

Results of experimental investigations of laser radiation interaction with the Ti, Co, NiFe, TbFe and LaSrMnO3 films are presented. It is shown, that it is possible to improve magnetic characteristics and to obtain magnetic films with regular distribution of nanodots by the laser radiation. It is observed an increasing of magnetic permeability and the reduction of the coercive force after irradiation of the NiFe films by the nanosecond laser pulses that are induced by the substantial growth of the size of the nanodots in the process of recrystallization. Magnetic nanodots of 100–200 nm size are produced by the method of the laser cutting of the continuous magnetic films, or are formed in a nonmagnetic matrix by the diffusion in the multilayered films and oxidization of TbFe and LaSrMnO3−x films at the irradiation of the nanosecond laser pulses.