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

doi:10.1006/jssc.1994.1112

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

Northwestern University

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

High-temperature electrical conductivity and Seebeck coefficient measurements were performed on single-CuO₂-layer La_1-xSr_1+x CuGaO₅ (x = 0.1 and 0.13) and double-CuO₂-layer Y_1-xCa_xSr₂ Cu₂GaO₇ (x = 0, 0.1, 0.2, 0.4). The solubility range in Y_1-xCa_xSr₂ Cu₂GaO₇ is most likely 0 ≤ x ≤ 0.2, whereas, only the x = 0.1 composition is stable in La_1-xSr_1+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 Y_1-xCa_xSr₂Cu₂GaO₇ . Solid solubility limits and charge localization play major roles in the establishment of superconductivity in these phases.

Original language	English
Pages (from-to)	338-344
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	109
Issue number	2
DOIs	https://doi.org/10.1006/jssc.1994.1112
Publication status	Published - Apr 1994

ASJC Scopus subject areas

Materials Chemistry
Physical and Theoretical Chemistry
Inorganic Chemistry

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title = "High-Temperature Electrical Characterization of Ga-Based Layered Cuprates",

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.",

author = "Tomlins, {G. W.} and Jeon, {N. L.} and Mason, {Thomas O} and Groenke, {D. A.} and Vaughey, {J. T.} and Poeppelmeier, {Kenneth R}",

year = "1994",

month = apr,

doi = "10.1006/jssc.1994.1112",

language = "English",

volume = "109",

pages = "338--344",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

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AU - Tomlins, G. W.

AU - Jeon, N. L.

AU - Mason, Thomas O

AU - Groenke, D. A.

AU - Vaughey, J. T.

AU - Poeppelmeier, Kenneth R

PY - 1994/4

Y1 - 1994/4

N2 - 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.

AB - 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.

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JF - Journal of Solid State Chemistry

SN - 0022-4596

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High-Temperature Electrical Characterization of Ga-Based Layered Cuprates

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