= Schottky anomaly
{wiki=Schottky_anomaly}
The Schottky anomaly refers to a specific behavior observed in the heat capacity of certain materials, particularly in ionic or non-metallic solids, at low temperatures. Named after physicist Walter H. Schottky, the phenomenon arises due to the presence of localized states or defects within the material's crystal structure. In these materials, as the temperature decreases, the heat capacity does not follow the expected behavior for standard Debye or Einstein models, which predict a decrease in heat capacity with decreasing temperature.
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