High resolution thermal imaging of hotspots in superconducting films
Journal article, 2007
Thermal imaging of hotspots in bridge structures of YbaCuO thin films is presented with micrometer resolution. Hotspots formed by passing transport currents are observed using a method based on the temperature dependence in the photoluminescence of a polymer thin film deposited on the superconductor. The hotspots are self maintained and have hysteretic behavior. An external magnetic field changes their behavior. The temperature distribution over the bridge and in its vicinity can be observed with a resolution better than 0.1 K. Also details of the experimental method will be reported.
Author
O. Haugen
Universitetet i Oslo
T. H. Johansen
Universitetet i Oslo
H. Chen
Universitetet i Oslo
V. Yurchenko
Universitetet i Oslo
P. Vase
NKT Research & Innovation AS
Dag Winkler
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
B. A. Davidson
Laboratorio Nazionale TASC
Gabriel Testa
National Reseach Council of Italy (CNR), Institute of Applied Sciences and Intelligent Systems "Eduardo Caianiello"
E. Sarnelli
National Reseach Council of Italy (CNR), Institute of Applied Sciences and Intelligent Systems "Eduardo Caianiello"
E. Altshuler
Universidad de La Habana
IEEE Transactions on Applied Superconductivity
1051-8223 (ISSN)
Vol. 17 2/3 3215-3218Subject Categories (SSIF 2011)
Physical Sciences
DOI
10.1109/TASC.2007.899341