Influence of anisotropy and interparticle interactions on the coercivity and remanence in superparamagnetic Fe/Au multilayers

► Coercivity and remanence in Fe/Au superparamagnetic multilayers vs. temperature. ► New model with blocked/superparamagnetic particles consistent with experiment. ► Key role of inter-particle interactions with particle size distribution included. ► Dominant contribution of shape anisotropy in effective anisotropy vs. temperature. ► Application the model to complex systems with size-distributed particles.