Europhys. Lett, 48 (1), pp. 73-78 (1999)
Universal relationship between the penetration depth and the normal-state conductivity in YBaCuO
A. Pimenov 1, A. Loidl 1, B. Schey 1, B. Stritzker 1,
G. Jakob 2, H. Adrian 2
A. V. Pronin 3 and Yu. G. Goncharov 3
1 Institut für Physik, Universität Augsburg - 86135
2 Institut für Physik, Universität Mainz - 55099 Mainz, Germany
3 Institute of General Physics, Russian Academy of Sciences - 117942 Moscow, Russia
(received 30 April 1999; accepted in final form 26 July 1999)
PACS. 74.25-q - General properties; correlations between physical properties
in normal and superconducting states.
PACS. 74.25Fy - Transport properties (electric and thermal conductivity, thermoelectric effects, etc.).
PACS. 74.76Bz - High- films.
The absolute values of the conductivity in the normal state and of the low-temperature penetration depths were measured for a number of different samples of the YBaCuO family. We found a striking correlation between and regardless of doping, oxygen reduction or defects, thus providing a simple method to predict the superconducting penetration depth and to have an estimate of the sample quality by measuring the normal-state conductivity.
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