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The heat capacity of the Mn3Sn2 compound was measured between 2 and 300 K in magnetic fields up to 7 T. The isothermal magnetic entropy change (ΔSM) and the adiabatic temperature change (ΔTad) were calculated from these data. In agreement with previous magnetic measurements, three transitions are detected in the zero-field heat capacity versus temperature curve, two λ-like peaks close to TC1∼262 K and TC2∼227 K due to ferromagneticlike second-order transitions and a third anomaly at Tt∼197 K ascribed to the development of a weak antiferromagnetic interaction. The Debye temperature is estimated to be ∼303 K from the low-temperature data. The thermal dependences of ΔSM and ΔTad present a two-peak response with peak maxima near TC1 and TC2. For a field variation of 5 T, the values of ΔTad are found to be ∼2.1 and ∼1.6 K, respectively. The results are discussed and compared to previously published data concerning other magnetic refrigerants working near room temperature. [ABSTRACT FROM AUTHOR]

The heat capacity of the [Mn.sub.3][Sn.sub.2] compound is measured in magnetic fields up to 7 T. The isothermal magnetic entropy change and the adiabatic temperature change are calculated and three transitions are detected in the zero-field heat capacity versus temperature curve.