Remarkable LnIII3FeIII2 clusters with magnetocaloric effect and slow magnetic relaxation

Two remarkable pentanuclear 3d–4f clusters of Ln3Fe2 were synthesized and structurally characterized. Magnetic studies indicate that Gd3Fe2 possesses the significant magnetic entropy change (−ΔSm) of 31.7 J kg−1 K−1 and slow magnetic relaxation is observed in the anisotropic Dy-analogue.