Magnetic ageing of electro-deposited Ni-Fe-P thin films

Abstract

Magnetic ageing phenomena were observed in electro‐deposited NiFeP thin films measuring saturation magnetization, ac hysteresis loop, coercive force, perpendicular anisotropy, uniaxial anisotropy, and rotational hysteresis loss. The mechanism of the ageing effect is discussed. The anisotropy is divided into two parts; the magnetization of the lower anisotropy part rotate in the direction of the higher part induced in the surface layer of the film.