Physical and chemical properties of (Y{sub 1-x}Ca{sub x})(Ba{sub 2-x}La{sub x})Cu{sub 3}O{sub 7-{delta}}

Journal Article · Sun Oct 01 04:00:00 EDT 1995 · Journal of Superconductivity

DOI:https://doi.org/10.1007/BF00727461· OSTI ID:207202

Zhou, J P; McDevitt, J T; Zhou, J S ^[1]

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1. Univ. of Texas, Austin, TX (United States); and others

The metallic conductivity of both the CuO{sub 2} sheets and the CuO{sub x} chains of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} has been established. The authors have used double doping in (Y{sub 1{minus}x}Ca{sub x})(Ba{sub 2{minus}x}La{sub x})Cu{sub 3}O{sub 7{minus}{delta}} to destroy the integrity of the CuO{sub 1{minus}{delta}} chains while keeping constant the total oxidation state of the Cu-O array. A break-up of the chain segments allows the authors to establish the temperature dependence of the Seebeck coefficient, {alpha}(T), due to the CuO{sub 2} sheets and, by difference, that of the CuO{sub 1-{minus}{delta}} chains in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}. The authors 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 {alpha}(T) is interpreted.

• Sponsoring Organization: USDOE
• OSTI ID: 207202
• Journal Information: Journal of Superconductivity, Journal Name: Journal of Superconductivity Journal Issue: 5 Vol. 8; ISSN JOUSEH; ISSN 0896-1107
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CALCIUM OXIDES
COPPER OXIDES
ELECTRIC CONDUCTIVITY
LANTHANUM OXIDES
SEEBECK EFFECT
STABILITY
YTTRIUM OXIDES