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Schlagwörter:
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Zusammenfassung:
Magneto-resistance and specific heat results indicate that UBe 13 is
phenomenologically related to Ce-based Kondo lattice systems like CeCu
2Si 2. Anisotropies of the Fermi surface of UBe 13 seem to furnish an
anisotropic superconducting pairing interaction. This causes the
formation of two superconducting order parameters on different parts of
the Fermi surface, as inferred from the observation of an additional
phase transition at 0.55 K in UBe 13 below T c=0.87 K. Th-doping
strongly affects the Fermi surface of UBe 13 by favoring the lower
transition. A partial explanation of the unusual phase diagram of the
superconducting states of U 1-xTh xBe 13 is proposed.
