The specific heat of Y0.7Th0.3C1.58
1978; Elsevier BV; Volume: 27; Issue: 4 Linguagem: Inglês
10.1016/0038-1098(78)90546-x
ISSN1879-2766
AutoresG. R. Stewart, A.L. Giorgi, M.C. Krupka,
Tópico(s)Rare-earth and actinide compounds
ResumoAbstract The specific heat of the novel high temperature superconductor Y0.7Th0.3C1.58 (Tc = 17.0 K) has been measured between 4 and 22 K. Unlike the other known high temperature superconductors (Tc > 16 K) which have either an A-15 or a NaCl-type structure, this material forms in the b.c.c., Pu2C3-type, structure. The Debye temperature, θD, is 346 K and the linear term coefficient, γ, of the specific heat has the value 4.66 mJ/mole-K2. Thus the electronic density of states, N(0), which is proportional to γ, is quite low. The energy gap, 2Δ/kTc, on the other hand has an anomalously high value of 5.8. Comparisons between these parameters of Y0.7Th0.3C1.58 and those for some A-15 and NaCl-type superconductors are made.
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