Large reversible magnetocaloric effect in TbCoC2 in low magnetic field

Abstract

A large reversible negative magnetic-entropy change ΔSM has been observed in TbCoC2⁠, accompanied by a second-order phase transition at 28K⁠. The maximum value of −ΔSM is 15.3Jkg−1K−1 at 30K for a magnetic-field change from 0to5T⁠, with the refrigerant capacity of 354Jkg−1⁠. In particular, also the large −ΔSMmax of 7.8Jkg−1K−1⁠, is obtained for a small field change from 0to2T⁠. The large reversible ΔSM and the high reversible refrigerant capacity in low magnetic field indicate that TbCoC2 may be a promising candidate for magnetic refrigeration at low temperatures.