High-Temperature Electrical Characterization of Ga-Based Layered Cuprates

G. W. Tomlins, N. L. Jeon, Thomas O Mason, D. A. Groenke, J. T. Vaughey, Kenneth R Poeppelmeier

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Abstract

High-temperature electrical conductivity and Seebeck coefficient measurements were performed on single-CuO2-layer La1-xSr1+x CuGaO5 (x = 0.1 and 0.13) and double-CuO2-layer Y1-xCaxSr2 Cu2GaO7 (x = 0, 0.1, 0.2, 0.4). The solubility range in Y1-xCaxSr2 Cu2GaO7 is most likely 0 ≤ x ≤ 0.2, whereas, only the x = 0.1 composition is stable in La1-xSr1+xCuGaO5. Carrier concentration is essentially independent of temperature and oxygen partial pressure in both systems. The defect structure is dominated by p = [AE′RE], where AE = alkaline earth and RE = La or Y. The conductivity, and therefore the mobility, is activated for x = 0 and x = 0.1 in Y1-xCaxSr2Cu2GaO7 . Solid solubility limits and charge localization play major roles in the establishment of superconductivity in these phases.

Original languageEnglish
Pages (from-to)338-344
Number of pages7
JournalJournal of Solid State Chemistry
Volume109
Issue number2
DOIs
Publication statusPublished - Apr 1994

Fingerprint

cuprates
solubility
Solubility
Seebeck coefficient
Defect structures
Seebeck effect
Superconductivity
Partial pressure
Carrier concentration
partial pressure
superconductivity
Earth (planet)
Oxygen
conductivity
Temperature
electrical resistivity
defects
oxygen
coefficients
Chemical analysis

ASJC Scopus subject areas

  • Materials Chemistry
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Cite this

High-Temperature Electrical Characterization of Ga-Based Layered Cuprates. / Tomlins, G. W.; Jeon, N. L.; Mason, Thomas O; Groenke, D. A.; Vaughey, J. T.; Poeppelmeier, Kenneth R.

In: Journal of Solid State Chemistry, Vol. 109, No. 2, 04.1994, p. 338-344.

Research output: Contribution to journalArticle

Tomlins, G. W. ; Jeon, N. L. ; Mason, Thomas O ; Groenke, D. A. ; Vaughey, J. T. ; Poeppelmeier, Kenneth R. / High-Temperature Electrical Characterization of Ga-Based Layered Cuprates. In: Journal of Solid State Chemistry. 1994 ; Vol. 109, No. 2. pp. 338-344.
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