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Title: Excess oxygen defects in layered cuprates

Excess oxygen defects in layered cuprates Neutron powder diffraction has been used to study the oxygen defect chemistry of two non-superconducting layered cuprates, La{sub 1. 25}Dy{sub 0.75}Cu{sub 3.75}F{sub 0.5}, having a T{sup {asterisk}}- related structure, and La{sub 1.85}Sr{sub 1.15}Cu{sub 2}O{sub 6.25}, having a structure related to that of the newly discovered double-layer superconductor La{sub 2-x}Sr{sub x}CaCu{sub 2}O{sub 6}. The role played by oxygen defects in determining the superconducting properties of layered cuprates is discussed. 16 refs., 2 figs.
Authors: ; ; ; ; ;
Publication Date:
OSTI Identifier:OSTI ID: 6614880
Report Number(s):CONF-900813-1
ON: DE90017669; CNN: STC-88-09854; TRN: 90-029269
DOE Contract Number:W-31109-ENG-38
Resource Type:Conference
Resource Relation:Conference: International conference on the chemistry of electronic ceramic materials, Grand Teton National Park, WY (USA), 16-21 Aug 1990
Research Org:Argonne National Lab., IL (USA)
Sponsoring Org:DOE/ER
Country of Publication:United States
Language:English
Subject: 36 MATERIALS SCIENCE; COPPER OXIDES; CRYSTAL DEFECTS; DYSPROSIUM OXIDES; LANTHANUM OXIDES; STRONTIUM OXIDES; CRYSTAL STRUCTURE; FLUORINE COMPOUNDS; HIGH-TC SUPERCONDUCTORS; NEUTRON DIFFRACTION; PARTIAL PRESSURE; ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; DIFFRACTION; DYSPROSIUM COMPOUNDS; HALOGEN COMPOUNDS; LANTHANUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS; SCATTERING; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS 360202* -- Ceramics, Cermets, & Refractories-- Structure & Phase Studies