Giant reversible magnetocaloric effect in orthorhombic GdScO3

The magnetic and magnetocaloric properties were studied in orthorhombic polycrystalline GdScO3. GdScO3 possesses an antiferromagnetic ordering below the Neel temperature similar to 2.8 K. Negligible thermal and magnetic hystereses were both observed in GdScO3, indicating a second-order feature of phase transition and a reversible magnetocaloric effect (MCE). In the magnetic field changes of 0-50 kOe and 0-70 kOe, giant maximum magnetic entropy changes of 39.39 J/kg K and 50.77 J/kg K were obtained near the liquid helium temperature, respectively. The giant reversible MCE indicates the polycrystalline GdScO3 is a very promising refrigerant candidate for the low-temperature magnetic refrigeration.