The multiple core–shell structure in Cu24Ln6 cluster with magnetocaloric effect and slow magnetization relaxation

Triple core–shell structures in the Cu24Gd6 and Cu24Dy6 clusters were first observed and structurally characterized. The magnetic investigations reveal that Cu24Gd6 possesses the significant magnetic entropy change (−ΔSm) of 21.2 J kg−1 K−1 for ΔH = 7 T, and a slow magnetization relaxation is observed in Cu24Dy6.