Dependence of the magnetocaloric effect in superparamagnetic nanocomposites on the distribution of magnetic moment size

The magnetocaloric effect of superparamagnetic nanocomposites was studied by evaluating their magnetic entropy changes ΔS from magnetization data sets. Influence of distribution of the magnetic moment size on ΔS was evaluated. It is pointed out that a narrow size distribution is favorable for high performance of the magnetocaloric effect.