Magnetocaloric effect in slightly crystallised Co–Nb–Cu–Si–B alloy

Abstract Temperature dependence of the entropy variation Δ S M was calculated from the magnetisation data. A considerable magnetic entropy change was observed in nanocrystalline and amorphous samples even for relatively small field changes. The maximum of Δ S M was found to appear in the vicinity of the cluster glass–superparamagnetic transition which occurs around the Curie temperature of the amorphous phase.