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 language | English |
|---|---|
| Pages (from-to) | 338-344 |
| Number of pages | 7 |
| Journal | Journal of Solid State Chemistry |
| Volume | 109 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Apr 1994 |
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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 journal › Article
}
TY - JOUR
T1 - High-Temperature Electrical Characterization of Ga-Based Layered Cuprates
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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U2 - 10.1006/jssc.1994.1112
DO - 10.1006/jssc.1994.1112
M3 - Article
VL - 109
SP - 338
EP - 344
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
SN - 0022-4596
IS - 2
ER -