Fluctuating clusters in a reentrant spin-glass system

Abstract

We theoretically examined the reentrant spin-glass transition in a dilute ferromagnetic (FM) system. Results show that clusters of fluctuating spins exist in the FM phase. As the temperature is decreased, the spins in those clusters freeze in conjunction with all other spins in the system. This freezing breaks up the FM order into ferromagnetic clusters. These results are compatible with those of a phenomenological random field model that was proposed for experimentation.