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 language | English |
|---|---|
| Pages (from-to) | 118-124 |
| Number of pages | 7 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 328 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1999 Dec 1 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Metal-insulator transition and superconductivity in Sr- and La-substituted BaPb1-xBixO3
AU - Yamamoto, Ayako
AU - Furumochi, T.
AU - Tajima, S.
PY - 1999/12/1
Y1 - 1999/12/1
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=0033324457&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(99)00539-0
DO - 10.1016/S0921-4534(99)00539-0
M3 - Article
AN - SCOPUS:0033324457
VL - 328
SP - 118
EP - 124
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1
ER -