Effect of the magnetic anisotropy energy distribution of MnSb clusters on spontaneous magnetization reversal of GaMnSb thin films

Temperature $m(T)$ and time $m(t)$ dependences of the magnetic moment of GaMnSb thin films with MnSb clusters have been measured. The $m(t)$ dependences are straightened in semilogarithmic coordinates $m(\ln t)$. The temperature dependences of magnetic viscosity $S(T)$ corresponding to the slope of straight lines $m(\ln t)$ have been studied. It have been demonstrated that the behavior of dependences $S(T)$ is governed by the lognormal distribution of the magnetic anisotropy energy of MnSb clusters. It have been found that the behavior of dependences $m(T)$ measured after the films were cooled in zero magnetic field and in magnetic field $H$ = 10 kOe is also governed by the lognormal distribution of the magnetic anisotropy energy of MnSb clusters.