Nernst effect in a high temperature superconductor

Abstract

A Nernst effectnext term has been observed in previous termanext term Tl-Ba-Ca-Cu-O superconducting thin film. The film was irradiated with laser pulses inducing previous terma temperaturenext term gradient perpendicular to the film surface. previous termA Nernstnext term voltage was obtained perpendicular to both the previous termtemperaturenext term gradient and previous termanext term magnetic field applied parallel to the film surface. We attribute the previous termNernst effectnext term to flux depinning and flux transport driven by the laser induced thermal gradient. From an analysis of the dependence of the previous termNernstnext term voltage on film previous termtemperaturenext term we find previous termanext term distribution of pinning energies ranging from 100 K to 4000 K.