Surface resistance of epitaxial and polycrystalline NbCN films in submillimeter wave region

Abstract

Surface resistances, R/sub s/'s, of epitaxial and polycrystalline NbCN films in submillimeter-wave region were evaluated from measurements of Fiske-resonant modes in Josephson tunnel junctions. It is found that epitaxial NbCN films have about one order of magnitude smaller R/sub s/ values than those for polycrystalline NbCN films. It is also found that the frequency dependence of R/sub s/ of epitaxial and polycrystalline NbCN films can be explained by the two-fluid model.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>