Numerical Simulation of Magnetic Microstructure in Nanocrystalline Thin Films with the Random Anisotropy
The magnetic structure of thin nanocrystalline ﬁlms with a random distribution of magnetization easy axes was studied by means of micromagnetic modeling. The dependences of the correlation function parameters of the non-uniform magnetization on the value of the external in-plane magnetic ﬁeld were investigated in the wide range (6-1000 nm) of particles sizes. An analysis of the obtained dependences revealed a signiﬁcant diﬀerence between longitudinal (along the ﬁeld) and transversal (perpendicular to the ﬁeld) correlation radii of a stochastic magnetic structure. The blocking eﬀect of a ﬁne magnetic structure-a magnetization ripple-was observed during magnetization reversal of the ﬁlms.