Author's personal copy Dependence of the superconducting transition temperature of the filled skutterudite compound PrPt4Ge12 on hydrostatic pressure

The temperature-dependent ac susceptibility of the filled skutterudite superconductor PrPt4Ge12 has been measured under hydrostatic He-gas pressure to 0.58 GPa. The superconducting transition temperature Tc decreases linearly with pressure P from 7.91 K at ambient pressure to 7.83 K at 0.58 GPa, giving the rate dTc/dP = 0.19 ± 0.03 K/GPa. Evidence is presented that suggests that the value of Tc in this compound is slightly reduced due to magnetic pair-breaking effects from the Pr cations. 2012 Elsevier B.V. All rights reserved.