AC calorimetry study on the pressure-induced superconductor UIr

Abstract We have measured the heat capacity of the pressure-induced superconductor UIr by AC calorimetry under pressures up to 1.6 GPa . The heat capacity shows an anomaly at the Curie temperature T C 1 , and this anomaly shifts to lower temperatures with increasing pressure. The present pressure dependence of T C 1 was consistent with the results obtained by the previous resistivity and magnetization measurements.