J. Phys. Colloques
Volume 46, Numéro C10, Décembre 1985Eighth International Conference on Internal Friction and Ultrasonic Attenuation in Solids
|Page(s)||C10-703 - C10-706|
J. Phys. Colloques 46 (1985) C10-703-C10-706
DETECTION OF BOUND VORTEX-ANTIVORTEX PAIRS IN A SUPERCONDUCTING THIN FILM BY SURFACE ACOUSTIC WAVESA. SCHENSTROM1, M. LEVY1, H.P. FREDRICKSEN2 and J. GAVALER3
1 Department of Physics, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, U.S.A.
2 Sperry Corporation, Sperry Park, PO Box 6425, MS U1M14, St. Paul, MN 55164-0525, U.S.A.
3 Westinghouse Electric Corporation, Research and Development Center, Pittsburgh, PA 15235, U.S.A.
The possibility of detecting the normal cores of vortices in a superconducting thin film, by acoustoelectric coupling of surface acoustic waves to the local sheet resistivity of the film, is discussed. The attenuation of 700 MHz SAW's by a superconducting NbN film has already been reported. We find that the observed attenuation is proportional to the density of these vortices.