Paraconductivity measurements and comparative studies of fluctuations in BiSrCaCuO, YBaCuO and YBaCuO with Gd substitution [electronic resource].
- Published:
- Brussels : North Atlantic Treaty Organization, 1991. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- 10 pages : digital, PDF file
- Additional Creators:
- Argonne National Laboratory, North Atlantic Treaty Organization, and United States. Department of Energy. Office of Scientific and Technical Information
- Access Online:
- www.osti.gov
- Summary:
- Information concerning the dimensionality of the superconductive fluctuations in the new high temperature superconductors can be derived from the excess conductivity (or paraconductivity) near the transition temperature. Here the `lowering`` of the sample resistance in the same temperature regions is used for extraction of dimensionality and generally for comparative studies of the critical behaviour of three different samples such as YBa₂Cu₃O₇, Y{sub 0.8}Gd{sub 0.2}Ba₂Cu₃O₇ and Bi{sub 0. 85}Pb{sub 0.15}SrCa{sub 1.2}Cu₂O₆. The experimental data of the three samples show a similar behaviour with some distinct differences depending rather on the ``metallurgical`` state of the material than the composition itself. A logarithmic behaviour is present for YBaCuO and Y(Gd)BaCuO samples not close to the critical temperature and, the most important, closer to {Tc} YBaCuO shows a fractal behaviour, observed for the first time, similar to the one of Bi-compound observed many times before.
- Subject(s):
- Note:
- Published through SciTech Connect., 12/31/1991., "anl/cp--75114", " conf-910860--3", "DE92007377", North Atlantic Treaty Organization (NATO) Advanced Study Institute on physics and materials science of high-temperature superconductors,Corfu Island (Greece),18-31 Aug 1991., and Apostolopoulos, G.; Munoz, J.S.; Ausloos, M.; Luo, H.L.; Pont, M.; Politis, C.; Puig, T.; Patapis, S.K.; Balachadran, U.; Sideridis, L.
- Funding Information:
- W-31109-ENG-38
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