High temperature heat capacity of Zr75Rh25 superconducting system in amorphous, metastable and stable crystal state

Heat capacity of the Zr75Rh25 superconducting system in amorphous, metastable and stable crystal states in the 100-700 K temperature range has been measured using a differential scanning calorimeter. The analysis of the results obtained has shown that density of electron state at the Fermi level increases during the process of amorphnous state formation, but a phonon spectrum, as a whole, becomes more rigid and an anharmonicity becomes stronger. In consequence, Tsub(c) increase during the process of amorphous state formation is mainly associated with the increase of etectron density of states the Fermi tevet