CALORIMETRIC AND RESISTIVE MEASUREMENTS OF AMORPHOUS SPLAT COOLED LA1-XGAX FOILS

The heat capacities, transition temperatures, electrical resistivities, and upper critical fields have been measured for a series of La1-xGax alloys with x=0.16-x=0.28. Values of the Debye temperature, density of states, and electron-phonon coupling constant have been determined from these measurements. Superconductivity in this amorphous system is of the intermediate-coupling nature with 0.8 and the ratio of the non-phonon-renormalized density of states to that of the free-electron model is N(0)(1+) NFe 2.2. Specific-heat data as a function of concentration suggest a change in short-range order for x between 0.22 and 0.26. © 1978 The American Physical Society.