https://doi.org/10.1140/epjb/e2003-00125-4
Observation of a sharp lambda peak in the third harmonic voltage response of high-Tc superconductor thin films*
1
Laboratorium voor Vaste-Stoffysica en Magnetisme,
Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium
2
Department of Theoretical Physics, Sofia University St. Kliment Ohridski, 5 J. Bourchier Blvd., 1164 Sofia, Bulgaria
Corresponding author: a joseph.indekeu@fys.kuleuven.ac.be
Received:
13
November
2002
Revised:
21
February
2003
Published online:
7
May
2003
In this paper, we report on the sharp peak observed in the third
harmonic voltage response generated by a bias sinusoidal current
applied to several strips patterned in a
YBa2Cu3O thin film and in two
La
SrxCuO4 thin films, when the temperature is close
to the normal-superconductor transition. The lambda-shaped
temperature dependence of the third harmonic signal on the current
characteristics is studied. Several physical mechanisms of third
harmonic generation are examined.
PACS: 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003