Measurements of electrical resistivity, AC susceptibility and specific heat on Czochralski-grown single-crystalline UPt 3 reveal a transition into a superconducting state below 0.48K. From the experimental value of the upper critical field, dB c2 /dT=-4.4 T K -1 , and effective mass of 180m 0 is deduced. A numerical analysis of the normal-state specific heat data below 20K results in a large T 3 ln(T/T*) contribution, indicating pronounced spin-fluctuation effects.
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Visser et al. (1984) studied this question.
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