Heat Capacity of Ordered and Disordered Copper-Platinum Below 4.2°K
The order-disorder transformation in the copper-platinum system, which occurs in the alloy of 50 at.%, is unusual since the number of unlike nearest neighbors in the ordered condition is the same as it is, on the average, in the random disordered condition.1 Consequently, an explanation of the tendency toward ordering, which is based on a decreased interaction energy for unlike nearest neighbors (quasi-chemical theory), is not applicable.
KeywordsHeat Capacity Superlattice Reflection Electronic Specific Heat Lattice Heat Capacity Rigid Band Model
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