Specific Heats below 3°K of Pure Copper, Silver, and Gold, and of Extremely Dilute Gold-Transition-Metal Alloys
Specific Heats below 3°K of Pure Copper, Silver, and Gold, and of Extremely Dilute Gold-Transition-Metal Alloys
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纯铜、银和金以及极稀金过渡金属合金的比热低于 3°K
DOI：
10.1103/physrev.170.650
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发表时间：
1968
期刊：
影响因子：
--
通讯作者：
Douglas L. Martin
中科院分区：
文献类型：
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作者：
Douglas L. Martin
The electronic specific-heat coefficient γ and the limiting low-temperature Debye temperature (Θ 0 c) are estimated as 165.2±0.8 μcal/K 2 (g atom) and 345.8±1.2 K for copper, 153.1±0.9 μcal/K 2 (g atom) and 227.3±0.6 K for silver, and 165.1±1.0 μcal/K 2 (g atom) and 162.3±0.5 K for gold. The coefficient of the T 5 term in the expansion representing the lattice specific heat is-0.23±0.11 μcal/K 6 (g atom) for gold, and negligible for copper and silver. The γ value for gold is significantly lower than previously reported values. Effective masses of the electrons are: copper, 1.38; silver, 1.01; and gold, 1.09. Two alloys of gold with very small amounts of transition-metal impurity were also measured. For one of these, containing 2.5 ppm by weight Fe and 0.45-ppm Mn, the specific heat is about 5% higher than that of pure gold at 0.4 K and about 1% higher at 1 K.
