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Low‐temperature thermal conductivity of pure and impure niobium and tantalum single crystals
Author(s) -
Wasserbäch W.
Publication year - 1977
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.2220840123
Subject(s) - tantalum , impurity , niobium , thermal conductivity , materials science , thermal , analytical chemistry (journal) , metallurgy , thermodynamics , composite material , chemistry , chromatography , organic chemistry , physics
The thermal conductivities of niobium and tantalum single crystals of different impurity contents are measured between 0.3 and 20 K. Below about 1 K the thermal conductivities of all specimens vary with temperatures as T 3 , but the magnitude of the thermal conductivity decreases with increasing impurity content. A careful investigation of the defect structure of the specimens leads to the conclusion that interstitial and substitutional impurities give rise to a thermal resistance even at low temperatures.