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Abstrakty
The electrical resistance R(T) in function of temperature T, and X-ray powder diffraction (XRD) patterns of polycrystalline samples of the BaPb1-xBixO3 system have been described. R(T) measurements of single phase samples show that BaPbO3 exhibits metal-like properties, and that the system exhibits super-conductivity in the 0.005 < x < 0.30 range, but insulating properties for x > 0.30. A careful analysis of the onset of the critical temperature (TC) reveals its strong dependence on the sample composition in the range 0.005 < x < 0.30 which may be related to the superconducting volume fraction ultimately leading to connected or disconnected superconducting clusters, similar to those observed in granular superconductors.
Wydawca
Czasopismo
Rocznik
Tom
Strony
639--645
Opis fizyczny
Bibliogr. 23 poz.
Twórcy
autor
autor
autor
autor
autor
- Escola de Engenharia de Lorena - USP, P. O. Box 116, Lorena, SP 12602-810, Brazil
Bibliografia
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- [21] DOS SANTOS C.A.M., MOEHLECKE S., KOPELEVICH Y., MACHADO A.J.S., Phys. C, 390 (2003), 21.
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Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPW7-0014-0051