Deformation superstructures, tweed, and oxygen-vacancy ordering associated with phase transformations in YBa[sub 2]Cu[sub 3]O[sub [ital z]]

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.1337· OSTI ID:7303187

Goldman, M; Burmester, C P ^[1]; Wille, L T ^[2]; Gronsky, R ^[1]

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1. Department of Materials Science and Mineral Engineering, University of California at Berkeley, and Materials Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
2. Department of Physics, Florida Atlantic University, Boca Raton, Florida 33431 (United States)

A theoretical technique is described, employing Monte Carlo simulation, which allows the investigation of strain effects associated with transformations in solids. The method applies a grand canonical stress ensemble in the study of elasticity during phase evolution in YBa[sub 2]Cu[sub 3]O[sub [ital z]] where both oxygen occupancy and atomic positions in the basal plane, as well as total sample volume, can vary. Quenching experiments yield both metastable [radical]2[ital a][sub 0][times][radical]2[ital a][sub 0] superstructures from short-wavelength modulations and a tweed texture from long-period [l angle]110[r angle] modulations of the ordered [ital z]=7.0 compound.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7303187
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:2; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCULATION METHODS
CHALCOGENIDES
COMPUTERIZED SIMULATION
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL MODELS
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
HIGH-TC SUPERCONDUCTORS
ISING MODEL
MATHEMATICAL MODELS
MONTE CARLO METHOD
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POINT DEFECTS
SIMULATION
STRAINS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VACANCIES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES