Co and Fe substitution in YBa/sub 2/Cu/sub 3/O/sub 7//sub -//sub delta/
Journal Article
·
· J. Mat. Res.; (United States)
OSTI ID:5369954
The limiting substitution of Co or Fe for Cu in the orthorhombic superconducting phase YBa/sub 2/Cu/sub 3/O/sub 7//sub -//sub delta/ yields the tetragonal, semiconducting compositions YBa/sub 2/Cu/sub 2/CoO/sub 7.25/ and YBa/sub 2/Cu/sub 2.5/Fe/sub 0.5/O/sub 7.19/ after annealing at 400 /sup 0/C and slow cooling in O/sub 2/. Single-crystal x-ray structural analyses, conductivity and magnetic-susceptibility measurements, and thermogravimetric analysis (TGA) data provide evidence for Co or Fe substitution at the Cu(1) position and intercalation of peroxide ions (O/sub 2/)/sup 2 -/. The two compositions decompose for disintercalation of oxygen beyond O/sub 6.7/ for Co and O/sub 6.4/ for Fe when heated in N/sub 2/. The Cu(2) atoms of tetragonal YBa/sub 2/Cu/sub 3/O/sub 6/ appear to be antiferromagnetic below a T/sub N/approx. =240 K, which is similar to comparable Cu--O planar nets in stoichiometric La/sub 2/CuO/sub 4/.
- Research Organization:
- Center for Materials Science and Engineering, The University of Texas at Austin, Austin, Texas 78712
- OSTI ID:
- 5369954
- Journal Information:
- J. Mat. Res.; (United States), Journal Name: J. Mat. Res.; (United States) Vol. 3:2; ISSN JMREE
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Sun Jul 31 20:00:00 EDT 1988
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OSTI ID:5616543
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Mon Apr 10 00:00:00 EDT 1989
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Mon Jun 01 00:00:00 EDT 1992
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OSTI ID:7017439
Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETISM
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
COBALT COMPOUNDS
COBALT OXIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DATA
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
GRAVIMETRIC ANALYSIS
INFORMATION
IRON COMPOUNDS
IRON OXIDES
LOW TEMPERATURE
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MEDIUM TEMPERATURE
MONOCRYSTALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SUPERCONDUCTIVITY
TETRAGONAL LATTICES
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION ELEMENT COMPOUNDS
VALENCE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETISM
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
COBALT COMPOUNDS
COBALT OXIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DATA
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
GRAVIMETRIC ANALYSIS
INFORMATION
IRON COMPOUNDS
IRON OXIDES
LOW TEMPERATURE
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MEDIUM TEMPERATURE
MONOCRYSTALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SUPERCONDUCTIVITY
TETRAGONAL LATTICES
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION ELEMENT COMPOUNDS
VALENCE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES