Structural characterization and electrical resistance of the BaPb1-xBixO3 system

• Autorzy: Da Luz M. S. , Coelho A. D. A. , Dos Santos C. A. M. , Izario Filho H. J. , Machado A. J. S.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

electrical conductance; XRD patterns; superconductivity; superconducting clusters

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2010
• Tom: Vol. 28, No. 3
• Strony: 639--645
• Opis fizyczny: Bibliogr. 23 poz.

Twórcy

autor

Da Luz M. S.

autor

Coelho A. D. A.

autor

Dos Santos C. A. M.

autor

Izario Filho H. J.

autor

Machado A. J. S.

• Escola de Engenharia de Lorena - USP, P. O. Box 116, Lorena, SP 12602-810, Brazil

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