%0 Journal Article
%K measurement
%K pulse
%K thin films
%K film
%K films
%K thin
%K thin film
%K thin-film
%K thin-films
%K ybacuo
%K mechanism
%K density
%K current-density
%A Shiv K Gupta
%A Paul H Berdahl
%A Richard E Russo
%A Gabriel Briceño
%A Alex Zettl
%B Physica C: Superconductivity
%D 1993
%G eng
%M 35
%N 3-4
%P 335-344
%R 10.1016/0921-4534(93)90533-V
%T Pulse I-V characteristics measurement to study dissipation mechanism in epitaxial YBaCuO thin films at high current densities
%V 206
%8 02/1993
%) Laser
%X <p>A simple pulse method of measuring current-voltage characteristics (I-V) at high current densities is described. We report I-Vs on epitaxial YBa<sub>2</sub>Cu<sub>3</sub>O<sub>x</sub> thin films at high current densities in the presence of a magnetic field parallel to the c-axis. The results show that the Bardeen-Stephen flux flow model does not account for dissipation at high current densities in&nbsp;YBa<sub>2</sub>Cu<sub>3</sub>O<sub>x</sub> thin films. In the presence of a magnetic field, we find qualitative agreement with a simple theoretical model based on dissipation caused by 2D vortices excited from the flux lines. In the absence of a magnetic field, a power law behavior arises due to current-induced depairing of thermally excited 2D vortices.</p>