Physical and chemical properties of (Y1-xCax)(Ba2-xLax)Cu3O7-δ

J. P. Zhou; J. S. Zhou; J. B. Goodenoug; J. T. McDevitt

doi:10.1007/BF00727461

Physical and chemical properties of (Y_1-xCa_x)(Ba_2-xLa_x)Cu₃O₇-δ

J. P. Zhou, J. S. Zhou, J. B. Goodenoug, J. T. McDevitt

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

Abstract

The metallic conductivity of both the CuO₂ sheets and the CuO_x chains of YBa₂Cu₃O_7-δ has been established. We have used double doping in (Y_1-xCa_x)(Ba_2-xLa_x)Cu₃O_7-δ to destroy the integrity of the CuO_1-δ chains while keeping constant the total oxidation state of the Cu-O array. A break-up of the chain segments allows us to establish the temperature dependence of the Seebeck coefficient, α(T), due to the CuO₂ sheets and, by difference, that of the CuO_1-δ chains in YBa₂Cu₃O_7-δ. We also show that double doping enhances significantly the chemical stability of the superconductive phase. The origin of the chemical stability and of the behavior of α(T) is interpreted.

Original language	English (US)
Pages (from-to)	651-652
Number of pages	2
Journal	Journal of Superconductivity
Volume	8
Issue number	5
DOIs	https://doi.org/10.1007/BF00727461
State	Published - Oct 1995

Keywords

High-T superconductor
chain conduction
chemical stability
thermopower

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Physics and Astronomy (miscellaneous)

Access to Document

10.1007/BF00727461

Cite this

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title = "Physical and chemical properties of (Y1-xCax)(Ba2-xLax)Cu3O7-δ",

abstract = "The metallic conductivity of both the CuO2 sheets and the CuOx chains of YBa2Cu3O7-δ has been established. We have used double doping in (Y1-xCax)(Ba2-xLax)Cu3O7-δ to destroy the integrity of the CuO1-δ chains while keeping constant the total oxidation state of the Cu-O array. A break-up of the chain segments allows us to establish the temperature dependence of the Seebeck coefficient, α(T), due to the CuO2 sheets and, by difference, that of the CuO1-δ chains in YBa2Cu3O7-δ. We also show that double doping enhances significantly the chemical stability of the superconductive phase. The origin of the chemical stability and of the behavior of α(T) is interpreted.",

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author = "Zhou, {J. P.} and Zhou, {J. S.} and Goodenoug, {J. B.} and McDevitt, {J. T.}",

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T1 - Physical and chemical properties of (Y1-xCax)(Ba2-xLax)Cu3O7-δ

AU - Zhou, J. P.

AU - Zhou, J. S.

AU - Goodenoug, J. B.

AU - McDevitt, J. T.

PY - 1995/10

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N2 - The metallic conductivity of both the CuO2 sheets and the CuOx chains of YBa2Cu3O7-δ has been established. We have used double doping in (Y1-xCax)(Ba2-xLax)Cu3O7-δ to destroy the integrity of the CuO1-δ chains while keeping constant the total oxidation state of the Cu-O array. A break-up of the chain segments allows us to establish the temperature dependence of the Seebeck coefficient, α(T), due to the CuO2 sheets and, by difference, that of the CuO1-δ chains in YBa2Cu3O7-δ. We also show that double doping enhances significantly the chemical stability of the superconductive phase. The origin of the chemical stability and of the behavior of α(T) is interpreted.

AB - The metallic conductivity of both the CuO2 sheets and the CuOx chains of YBa2Cu3O7-δ has been established. We have used double doping in (Y1-xCax)(Ba2-xLax)Cu3O7-δ to destroy the integrity of the CuO1-δ chains while keeping constant the total oxidation state of the Cu-O array. A break-up of the chain segments allows us to establish the temperature dependence of the Seebeck coefficient, α(T), due to the CuO2 sheets and, by difference, that of the CuO1-δ chains in YBa2Cu3O7-δ. We also show that double doping enhances significantly the chemical stability of the superconductive phase. The origin of the chemical stability and of the behavior of α(T) is interpreted.

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