A PSEUDOPOTENTIAL APPROACH TO THE SUPERCONDUCTING STATE PROPERTIES OFMETALLIC-GLASS CA70MG30

The superconducting state properties of the metallic glass Ca70Mg30 ha ve been investigated in the BCS-Eliashberg-McMillan framework by exten ding this theory to the binary metal glasses. Pseudo ions with average properties have been considered to replace both types of ions in the system. Values of the superconducting state parameters, namely electro n-phonon coupling strength (lambda), Coloumb pseudopotential (mu), tr ansition temperature (T-c), isotope effect exponent (alpha) and intera ction strength (N0V) have been worked out using Ashcroft's potential a nd the linear potential due to Sharma and Kachhava along with six diff erent forms of dielectric screening. The form factors directly obtaine d from the screened pseudopotential of Veljkovic and Slavic have also been used to explicitly observe the effect of the dielectric screening on T-c, alpha and N-0 V through mu. The results obtained established the presence of a superconducting phase in Ca70Mg30 glass.