LOW TEMPERATURE HEAT CAPACITIES OF SUPERCONDUCTING NIOBIUM AND TANTALUM CARBIDES

被引：66
作者：
TOTH, LE
ISHIKAWA, M
CHANG, YA
机构：
来源：
ACTA METALLURGICA | 1968年 / 16卷 / 09期
基金：
美国国家航空航天局;
关键词：
D O I：
10.1016/0001-6160(68)90053-9
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Low-temperature heat capacities have been measured from 1.5 to 18°K in the Nb-C and Ta-C binary systems to determine the effects of carbon concentration and crystal structure on the coefficient of electronic specific heat, Debye temperature, and the superconducting Tc. Comparison of the present results with other measurements on carbides and nitrides reveals very simple regularities in the variation of γ and θD values with composition and crystal structure. The rapid decrease in Tc with decreasing carbon concentration in the monocarbides results from a decrease in both the electron-phonon interaction parameter and the unrenormalized density of electron states.(1). © 1968.
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页码：1183 / &
相关论文
共 17 条
[1]   UBER ELEKTRONENZUSTANDE VON HARTSTOFFEN MIT NATRIUMCHLORIDSTRUKTUR [J].
BILZ, H .
ZEITSCHRIFT FUR PHYSIK, 1958, 153 (03) :338-358
[2]  
BITTNER H, 1963, MONATSH CHEM, V0094
[3]  
CANDRON R, 1967, 2 INT C SEM MET COMP
[4]  
COSTA P, 1964, NUCL MET AIME, V10, P29
[5]  
COSTA P, 1967, P INT S ANISOTROPY S
[6]  
Geballe T.H., 1966, PHYSICS, V2, P293
[7]   EFFECT OF COMPOSITION ON SUPERCONDUCTING TRANSITION TEMPERATURE OF TANTALUM CARBIDE AND NIOBIUM CARBIDE [J].
GIORGI, AL ;
MATTHIAS, BT ;
BOWMAN, AL ;
STORMS, EK ;
SZKLARZ, EG .
PHYSICAL REVIEW, 1962, 125 (03) :837-&
[8]  
PESSALL N, 1967, AF336152729 FIN REP
[9]  
PIPER J, 1964, NUCL METALL, V10, P29
[10]  
Rudy E., 1966, TECHNICAL REPORT AFM
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