On the possibility of equilibrium tweed microstructure in tetragonal YBa2Cu3O7superconductors
Source abstract
Abstract
Abstract The role of elastic interactions in equilibrium correlations of oxygen distribution in YBa2Cu3O7 crystals is investigated. In a broad temperature interval of about 200 K above the tetragonal-orthorhombic transition temperature, a strong tendency for the formation of highly correlated sheet-like regions perpendicular to the 〈110〉 directions was found. The correlated oxygen distribution produces an anomalously high amplitude of shear displacement waves 〈110〉/〈110〉 characteristic of a ‘tweed’ microstructure. The elastic diffuse scattering from the predicted equilibrium tweed microstructure is analysed.
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Research context
OpenAlex topics: Physics of Superconductivity and Magnetism · Acoustic Wave Resonator Technologies
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References (33)
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