Abstract
Using several measured and calculated physical properties, we argue that the high-Tc metal-oxide superconductor Y1Ba2Cu3O7 is elastically soft compared with BaTiO3 or SrTiO3. We conclude that the bulk modulus equals approximately 107 GPa, despite several high-pressure x-ray diffraction studies that report values up to approximately 200 GPa. Part of the argument uses an ionic-crystal-model calculation of the bulk modulus.
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Ledbetter, H., Lei, M. Is Y1Ba2Cu3O7stiff or soft?. Journal of Materials Research 5, 241–244 (1990). https://doi.org/10.1557/JMR.1990.0241
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DOI: https://doi.org/10.1557/JMR.1990.0241