Volume 64, Number 3, November 2003
|Page(s)||399 - 405|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 November 2003|
Scattering approach to the magnetic susceptibility of high-temperature superconductors
Institute of Physics, ASCR - Na Slovance 2, 182 21 Prague 8, Czech Republic
2 Faculty of Mathematics and Physics, Charles University V Holešovičkách 2, 180 00 Prague 8, Czech Republic
Accepted: 18 August 2003
We study the dc and ac magnetic susceptibility of high-temperature superconductors in weak magnetic fields. The high-resolution magnetic measurements were done using the non-commercial SQUID magnetometer with the sample in a properly quiet electromagnetic surrounding. The sample is in a residual external ac field smaller than 1 and the typical applied ac field is about 1. We show that the interpretation of the temperature dependence of the susceptibility measured under these conditions cannot be based on temperature-dependent suprefluid density, but can be interpreted as due to temperature-dependent electron scattering.
PACS: 74.25.Ha – Properties of type I and type II superconductors: Magnetic properties / 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.)
© EDP Sciences, 2003
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