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1997 | 91 | 2 | 431-434
Article title

Specific Heat and Magnetoresistance of Y-, Tl- and Bi-Type High-Temperature Superconductors

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EN
Abstracts
EN
Specific heat of polycrystalline DyBa_{2}Cu_{3}O_{7} and Tl_{0.58}Pb _{0.42}Sr_{1.6}Ba_{0.4}Ca_{2}Cu_{3}O_{9} samples, as well as the single crystal of Bi_{2}Sr_{2}CaCu_{2}O_{8} have been measured within the temperature interval from 50 to 250 K. For Dy- and Tl-specimens the pronounced jump in specific heat and apparent contribution from Gaussian fluctuations of superconducting order parameter close to T_{c} have been observed. In contrary, for Bi-specimen only a rounded maximum within a broad interval around T_{c} has been detected. Magnetoresistance measurements as a function of temperature just below T_{c} have been carried out for Dy- and Tl-samples and the slopes of upper critical fields have been determined. The data have been analysed within a frame of Ginzburg-Landau-Abrikosov- Gorkov theory with additional Gaussian-like fluctuation term. The electronic specific heat coefficients γ, and the coherence length χ have been obtained.
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Publisher

Year
Volume
91
Issue
2
Pages
431-434
Physical description
Dates
published
1997-02
Contributors
author
  • Department of Solid State Physics, University of Mining and Metallurgy, Al. Mickiewicza 30, 30-059 Kraków, Poland
author
  • Department of Solid State Physics, University of Mining and Metallurgy, Al. Mickiewicza 30, 30-059 Kraków, Poland
  • Department of Solid State Physics, University of Mining and Metallurgy, Al. Mickiewicza 30, 30-059 Kraków, Poland
author
  • Johannes Kepler University, Institut of Chemical Technology, 4040 Linz, Austria
author
  • Johannes Kepler University, Institut of Chemical Technology, 4040 Linz, Austria
References
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Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv91z244kz
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