Synthesis and resistivity properties of Sr1-XLaXPbO3-δ and SrPb1-XBiXO3-δ

M. V. Lobanov, E. M. Kopnin, D. Xenikos, A. Ju Grippa, E. V. Antipov, J. J. Capponi, M. Marezio, J. P. Julien, J. L. Tholence

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15 Citations (Scopus)

Abstract

The solid solutions with the composition SrPb1-xBixO3-δ and Sr1-xLaxPbO3-δ were synthesized. It was found that the solubility limits do not exceed the values x = 0.2 and x = 0.1, respectively. It was shown by X-ray powder diffraction that the initial crystal symmetry (orthorhombic, space group Pnma) remains unchanged with the substitution, whereas unit cell parameters increase monotonically. The undoped SrPbO3-δ exhibit positive and negative temperature coefficient of resistivity at high and low temperatures, respectively. La-doping leads to a drastical decrease of the absolute value of the resistivity and for the doped samples with x ≥ 0.05 dp/dT is positive in the entire temperature range. Bi-doping leads, first to a similar decrease of resistivity, but at higher substitutions, variable range hopping conduction is observed. The results were interpreted in terms of quantum interference and a subsequent transition to localized electronic states.

Original languageEnglish
Pages (from-to)983-992
Number of pages10
JournalMaterials Research Bulletin
Volume32
Issue number8
DOIs
Publication statusPublished - Aug 1997
Externally publishedYes

Keywords

  • A. oxides
  • B. chemical synthesis
  • C. X-ray diffraction
  • D. crystal structure
  • D. electrical properties

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