Theory for the temperature dependence of oxygen ordering in YBa sub 2 (Cu sub 1 minus x M x ) sub 3 O sub 7 minus y due to impurities M =Al,Co,Fe

Journal Article · Sun Jul 01 00:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.42.288· OSTI ID:6534954

Baumgaertel, G; Jensen, P J; Bennemann, K H ^[1]

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1. Institute for Theoretical Physics, Freie Universitaet Berlin, Arnimallee 14, D-1000 Berlin (West Germany)

The temperature dependence of oxygen ordering in YBa{sub 2}(Cu{sub 1{minus}{ital x}M{ital x}}){sub 3}O{sub 7{minus}{ital y}} ({ital M}=Al,Co,Fe) is studied theoretically. A generalized mean-field model including short-range atomic correlations is used to investigate the effect of substitutional impurities on the ordering of oxygen atoms in the Cu(1) basal plane. The calculated phase diagram suggests that the macroscopically tetragonal phase observed for {ital x}{gt}0.025 and {ital y}{congruent}0 transforms at temperatures {ital T}{lt}800 K into an orthorhombic phase if the oxygen content in YBa{sub 2}(Cu{sub 1{minus}{ital x}M{ital x}}){sub 3}O{sub 7{minus}{ital y}} is reduced.

• OSTI ID: 6534954
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 42:1; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CRYSTAL STRUCTURE
COPPER OXIDES
YTTRIUM OXIDES
ALUMINIUM ADDITIONS
COBALT ADDITIONS
CRYSTAL-PHASE TRANSFORMATIONS
HIGH-TC SUPERCONDUCTORS
IRON ADDITIONS
MEAN-FIELD THEORY
ORTHORHOMBIC LATTICES
PHASE DIAGRAMS
TEMPERATURE DEPENDENCE
TETRAGONAL LATTICES
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ALUMINIUM ALLOYS
BARIUM COMPOUNDS
CHALCOGENIDES
COBALT ALLOYS
COPPER COMPOUNDS
CRYSTAL LATTICES
DIAGRAMS
IRON ALLOYS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360202* - Ceramics
Cermets
& Refractories- Structure & Phase Studies
360204 - Ceramics
Cermets
& Refractories- Physical Properties