THE FREQUENCY AND DC MAGNETIC-FIELD DEPENDENCE OF THE RF PENETRATION DEPTH IN THE SOLID AND FLUID VORTEX PHASES OF BI-PB-SR-CA-CU-O

Authors
Citation
Fj. Owens, THE FREQUENCY AND DC MAGNETIC-FIELD DEPENDENCE OF THE RF PENETRATION DEPTH IN THE SOLID AND FLUID VORTEX PHASES OF BI-PB-SR-CA-CU-O, Journal of physics. Condensed matter, 6(44), 1994, pp. 9311-9315
Citations number
12
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
09538984
Volume
6
Issue
44
Year of publication
1994
Pages
9311 - 9315
Database
ISI
SICI code
0953-8984(1994)6:44<9311:TFADMD>2.0.ZU;2-X
Abstract
The frequency and DC magnetic field dependence of the change in the RF penetration depth resulting from vortex-induced dissipation has been measured in Bi-Pb-Sr-Ca-Cu-O above and below the depinning transition. The dissipation is shown to have a linear dependence on B1/2 at const ant temperature in the solid and fluid vortex phases with a different slope in each phase. The dissipation is observed to be independent of frequency in the pinned regime but decreases with increasing frequency in the fluid state. The magnetic field at which the transition occurs at constant temperature is frequency dependent, decreasing with incre asing frequency. The results are in general agreement with theoretical predictions of the magnetic field and frequency dependence of the pen etration depth.