Abstract
The heat capacities of a number of metals have been measured in the region below 1°K, using the technique of adiabatic demagnetization. Copper, silver, platinum, palladium, tungsten, molybdenum, and sodium have been investigated. Apart from sodium, all exhibit a linear dependence of electronic specific heat on temperature. The values of are in agreement with those obtained in the liquid helium region, except in the case of tungsten, which gives cal/mole in contrast to the previous value cal/mole reported in the literature. Sodium exhibits an anomalous peak in its specific heat curve. A low-temperature, martensitic-type transformation is advanced as a likely cause of this behavior.
In the course of the experiments, an independent measurement of the heat capacity of copper potassium sulfate has been made. The relation appears to be obeyed, the value of the specific heat constant being /mole.
- Received 9 June 1954
DOI:https://doi.org/10.1103/PhysRev.95.1428
©1954 American Physical Society