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Thermal conductivity of NbTi alloy in the low‐temperature range
Author(s) -
Flachbart K.,
Feher A.,
Jánoš Š.,
Málek Z.,
Ryska A.
Publication year - 1978
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220850217
Subject(s) - atmospheric temperature range , thermal conductivity , thermal diffusivity , superconductivity , materials science , condensed matter physics , chemistry , thermodynamics , physics
The temperature dependence of the thermal conductivity of a NbTi (50/50) superconductor is measured in the temperature range from 1.3 to 300 K in two different laboratories. From the analysis of the experimental results it follows that the electron processes provide the main contribution to the thermal transport in the range above 0.3 T c while phonon contribution is decisive, due to the defect structure, only below this temperature. The values of energy gap 2Δ = (2.15 to 2.3) kT c are found by three independent methods. Further, the temperature dependence of the thermal diffusivity is presented in the temperature range above 4 K.
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