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.
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Li et al. (2008) studied this question.
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