Metal-insulator transition and superconductivity in Sr- and La-substituted BaPb1-xBixO3

Ayako Yamamoto, T. Furumochi, S. Tajima

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Compositional boundaries of the metal-insulator transition (MIT) in Sr- and La-substituted BaPb1-xBixO3 (BPBO) were determined by dc susceptibility, electrical resistivity and thermoelectric power (TEP) measurements. By the 20% substitution of Sr for Ba, a Bi compositional range for metallic (superconducting) phase considerably extended to the Bi-rich region (x≈0.5), though BPBO exhibited metal (superconductivity) only below x = 0.3. On the other hand, by the 10% La substitution, a Bi range for metal (superconductivity) slightly decreased to the Bi-poor region (x≈0.25). Transport properties indicated that the MIT takes place at the lattice parameter ap≈4.29 angstroms, irrespective of the substitution elements. This suggests that the cell size determining the Bi-O orbital overlap and/or a magnitude of the band split, is one of the essential factors of the MIT in BPBO.

Original languageEnglish
Pages (from-to)118-124
Number of pages7
JournalPhysica C: Superconductivity and its Applications
Volume328
Issue number1
DOIs
Publication statusPublished - 1999 Dec 1
Externally publishedYes

Fingerprint

Metal insulator transition
Superconductivity
Substitution reactions
superconductivity
insulators
Metals
metals
substitutes
Thermoelectric power
Transport properties
Lattice constants
lattice parameters
transport properties
magnetic permeability
orbitals
electrical resistivity
cells

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Metal-insulator transition and superconductivity in Sr- and La-substituted BaPb1-xBixO3 . / Yamamoto, Ayako; Furumochi, T.; Tajima, S.

In: Physica C: Superconductivity and its Applications, Vol. 328, No. 1, 01.12.1999, p. 118-124.

Research output: Contribution to journalArticle

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