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Bulk-Moduli Systematics in Oxides, Including Superconductors
Published
Author(s)
H M. Ledbetter, Sudook A. Kim
Abstract
For oxides, including superconductors, we consider the systematics fo the bulk-modulus/atomic-volume (B/Vα) relationship. For nonsuperconducting oxides, the B-Vα diagram shows that most oxides fall in three sets: (1) rocksalt crystal structure, AO; (2) perovskite crystal structure, ACOd3^; (3) transition-metal oxides ranging through stoichiometries of AO, A3O4. A2O. Seventeen oxide superconductors show a surprisingly narrow Va range and a relatively narrow range of B = 116 19 Gpa. B-Va slopes depart from expectations from a simple ionic-crystal model. Within a superconductor subgroup, for example, La-O or T1-O. higher B corresponds to higher Tc. Because the in-plane (CuO2-plane) compressibility probably varies little among these cuprates, the out-of-plane compressibility should correlate inversely with Tc.
Citation
Bulk-Moduli Systematics in Oxides, Including Superconductors
Volume
II
Publisher Info
Handbook of Elastic Properties of Solids, Fluids, and Gases ,
Ledbetter, H.
and Kim, S.
(2001),
Bulk-Moduli Systematics in Oxides, Including Superconductors, Handbook of Elastic Properties of Solids, Fluids, and Gases , , [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851365
(Accessed October 15, 2024)