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The low-temperature phase diagram of U1-xThxBe13

  • Author(s): Felder, E
  • Bernasconi, A
  • Ott, HR
  • Fisk, Z
  • Smith, JL
  • et al.

Measurements of specific heat c (T) and thermal conductivity λ(T) give a detailed picture of the T (x) phase diagram of superconducting U Th Be below 1 K. A distinct minimum for T is noted for x ≈ 0.018. Increasing x further results in increasing values for T and the occurence of a second phase transition in the superconducting state at T < T . Two phase transitions are observed between 0.02 < x < 0.045. T is roughly constant with varying x. For x > 0.05, only one single transition occurs and T decreases with further increasing x. Anomalous behaviour is also observed for UBe B for y values between 0 and 0.05 in the sense that the c anomalies at the superconducting transition are distinctly larger than the corresponding discontinuity observed in pure UBe . The influence of B-doping on the phase diagram of U Th Be has also been studied. © 1989. p c 1-x x 13 c c1 c2 c1 c2 c 13-y y p 13 1-x x 13

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