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Low-temperature specific heat of the heavy electron superconductor U1−xThxBe13(x=0, 0.033) in external magnetic fields

Abstract

We report on results of low-temperature specific-heat measurements of the unconventional superconductors UBe13 and U0.9669Th0.0331 Be13 in external magnetic fields up to 7 T. For T ≪ Tc, or, respectively, Tc2 for the thoriated sample, the magnetic field-induced contribution to Cp(T,B) varies linearly with temperature, which is consistent with the temperature dependence of the specific heat due to the flow of supercurrent around the vortices. © 2000 Elsevier Science B.V. All rights reserved.

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