Phys. Rev. B 70, 064516 (2004) [8 pages]Superconducting phase diagram of the filled skuterrudite PrOs4Sb12Received 16 March 2004; published 27 August 2004 We present new measurements of the specific heat of the heavy fermion superconductor PrOs4Sb12, on a sample which exhibits two sharp distinct anomalies at Tc1=1.89 K and Tc2=1.72 K. They are used to draw a precise magnetic field-temperature superconducting phase diagram of PrOs4Sb12 down to 350 mK. We discuss the superconducting phase diagram of PrOs4Sb12 and its possible relation with an unconventional superconducting order parameter. We give a detailed analysis of Hc2(T), which shows the paramagnetic limitation (a support for even parity pairing) and multiband effects. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.70.064516
DOI:
10.1103/PhysRevB.70.064516
PACS:
74.25.Dw, 65.40.Ba, 71.27.+a, 74.25.Op
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