Low field induced giant anisotropic magnetocaloric effect in DyFeO₃ single crystal

We have investigated the anisotropic magnetocaloric effect and the rotating field magnetic entropy in DyFeO₃ single crystal. A giant rotating field entropy change of -ΔS_M^R=16.62 J/kg·K was achieved from b axis to c axis in bc plane at 5 K for a low field change of 20 kOe. The large anisotropic magnetic entropy change is mainly accounted for the 4f electron of rare-earth Dy³⁺ ion. The large value of rotating field entropy change, together with large refrigeration capacity and negligible hysteresis, suggests that the multiferroic ferrite DyFeO₃ singlecrystal could be a potential material for anisotropic magnetic refrigeration at low field, which can be realized in the practical application around liquid helium temperature region.