Physics – Condensed Matter – Superconductivity
Scientific paper
1999-07-02
Physics
Condensed Matter
Superconductivity
31 pages, 8 figures. Subm. to PRB
Scientific paper
10.1103/PhysRevB.62.11826
Using a two-coil mutual inductance method, we have measured the complex resistivity, rho_v(T,Be), of pinned vortices in c-axis pulsed laser deposited YBa2Cu3O7-d films with magnetic field Be applied perpendicular to the film. At low frequencies, (<100 kHz), rho_v is inductive and is inversely proportional to the Labusch parameter, the average vortex pinning force constant, kappa_exp. The observed weakening of kappa_exp with Be is consistent with a simple model based on linear pinning defects. Adding classical thermal fluctuations to the model in a simple way describes the observed linear T dependence of rho_v, below ~15 K and provides reasonable values for the effective radius (.3 nm to >.8 nm) of the defects and the depth of the pinning potential. The success of this model implies that thermal supercurrent (phase) fluctuations have their full classical amplitude down to 5 K for frequencies below the characteristic depinning frequency. To date, no sufficient theory exists to explain the data between ~15 K and the vortex glass melting temperature.
Lemberger Thomas R.
Pesetski Aaron A.
No associations
LandOfFree
Experimental Study of the Inductance of Pinned Vortices in Superconducting YBa2Cu3O7-d Films does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Experimental Study of the Inductance of Pinned Vortices in Superconducting YBa2Cu3O7-d Films, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Experimental Study of the Inductance of Pinned Vortices in Superconducting YBa2Cu3O7-d Films will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-581652