Magnetization hysteresis of magnetic nanoclusters V15 in a swept magnetic field

Abstract Magnetization hysteresis of superparamagnetic systems in a swept magnetic field has been investigated. The consideration was made in the framework of the model based on non-equilibrium properties of superparamagnetic systems, namely on the difference in spin and lattice temperatures that appears in alternating magnetic field. The temperature of the spin subsystem and consequently, the magnetization of the sample are shown to “lag” systematically from alternating magnetic field. This fact can cause the magnetization hysteresis observed. The results of the calculation are compared with experimental data.