ATTENUATION OF ELASTIC SURFACE WAVES IN THIN FILM SUPERCONDUCTING PB AND IN AT 316 MHZ

The attenuation of elastic surface waves in thin films (about 1000 Å) of the superconductors, In and Pb, at a frequency of 316 MHz has been measured as a function of temperature below the critical temperature. There is no steep-falling character of ( αs αn) at Tc although a surface wave generates also a shear strain in the films. The temperature dependence of ( αs αn) appears to follow roughly the expectation of the BCS theory for longitudinal waves. © 1969.