Title :
Photoconductive response of granular superconducting films
Author :
Strom, U. ; Snow, E.S. ; Henry, R.L. ; Broussard, P.R. ; Claassen, J.H. ; Wolf, S.A. ; Leung, M. ; Simon, R.W.
Author_Institution :
US naval Res. Lab., Washington, DC, USA
fDate :
3/1/1989 12:00:00 AM
Abstract :
The application of a DC magnetic field to disordered or granular films of Y-Ba-Cu-O is shown to lead an enhancement of a nonbolometric photoresponse at temperatures near and below Tc. The disorder is evidenced by the broadened resistive transition to superconductivity and by the higher normal state resistance of the films. This observation is consistent with a nonequilibrium effect, which is described by the flux-flow model of the low-temperature photoresponse of granular superconductors
Keywords :
barium compounds; high-temperature superconductors; photoconductivity; superconducting thin films; yttrium compounds; DC magnetic field; Y-Ba-Cu-O; broadened resistive transition; disorder; flux-flow model; granular superconducting films; high temperature superconductor; low-temperature photoresponse; nonbolometric photoresponse; nonequilibrium effect; normal state resistance; photoconductive response; Granular superconductors; High temperature superconductors; Magnetic field measurement; Magnetic fields; Magnetic films; Optical films; Photoconductivity; Superconducting films; Superconducting microwave devices; Superconducting transition temperature;
Journal_Title :
Magnetics, IEEE Transactions on
