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Joule heating induced by vortex motion in a type-II superconductor Z. L. Xiao and E. Y. Andrei
 

Summary: Joule heating induced by vortex motion in a type-II superconductor
Z. L. Xiao and E. Y. Andrei
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08855
P. Shuk and M. Greenblatt
Department of Chemistry, Rutgers University, Piscataway, New Jersey 08855
Received 8 January 2001; published 10 August 2001
We present experiments that determine the temperature increase in a type-II superconductor due to Joule
heating induced by vortex motion. The effect of Joule heating is detected by comparing the response of the
vortex lattice to fixed amplitude current steps of short 10 s and long 4 s duration, where the Joule heating
is negligible and saturates, respectively. The thermometry is based on the temperature dependence of the
voltage response of the vortex lattice to a driving current. By monitoring the temperature increase in NbSe2
samples adhered on a sapphire substrate with GE varnish we obtain the effective heat transfer coefficient
between the sample and the bath and show that the heating is primarily due to the power dissipated by the
vortex motion.
DOI: 10.1103/PhysRevB.64.094511 PACS number s : 74.60.Ec, 65.90. i, 66.70. f
I. INTRODUCTION
In the mixed state of a type-II superconductor vortex mo-
tion induces dissipation. Due to the finite heat-removal rate
from the sample to the bath, Joule heating associated with
the vortex motion leads to an increase in sample temperature.

  

Source: Andrei, Eva Y. - Department of Physics and Astronomy, Rutgers University

 

Collections: Materials Science; Physics