Structural properties of high-T/sub c/ oxide superconductors. [YBa/sub 2/Cu/sub 3/O/sub 7-x/ and La/sub 2-x/M/sub x/CuO/sub 4-y/ (M = Ba, Sr, Ca)]
Conference
·
OSTI ID:5681079
Structural studies have played a key role in understanding the new oxide superconductors. Neutron powder diffraction techniques have been of particular importance because of the difficulty in synthesizing single crystals of the desired quality and compositions and because of the need to accurately determine the locations and site occupancies of the oxygen atoms. The electronic properties have been shown to depend in a critical way on the structural details of the Cu-O sublattices in these compounds. The La/sub 2-x/M/sub x/CuO/sub 4-y/ (M = Ba, Sr, Ca,...) structure contains a two-dimensional square planar Cu-O sublattice with weak bonding between the layers. The YBa/sub 2/Cu/sub 3/O/sub 7-x/ structure contains both two-dimensional and one-dimensional Cu-O sublattices, commonly referred to as ''planes'' and ''chains.'' Closely-related non-superconducting phases which exhibit small differences in stoichiometry or symmetry have also been studied and have provided key insights into the close relationship between structure and superconductivity in these systems. 88 refs., 6 figs.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5681079
- Report Number(s):
- CONF-870873-19; ON: DE88002974
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Mon Oct 15 00:00:00 EDT 2018
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·
OSTI ID:22771003
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· Inorg. Chem.; (United States)
·
OSTI ID:5709587
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Journal Article
·
Mon Dec 31 23:00:00 EST 1990
· Journal of the American Ceramic Society; (United States)
·
OSTI ID:5643097
Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETISM
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
DOCUMENT TYPES
ELECTRONIC STRUCTURE
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LATTICE PARAMETERS
MAGNETISM
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POINT DEFECTS
RARE EARTH COMPOUNDS
REVIEWS
SCATTERING
STOICHIOMETRY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VACANCIES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETISM
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
DOCUMENT TYPES
ELECTRONIC STRUCTURE
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LATTICE PARAMETERS
MAGNETISM
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POINT DEFECTS
RARE EARTH COMPOUNDS
REVIEWS
SCATTERING
STOICHIOMETRY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VACANCIES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES