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|Author(s):||H M. Ledbetter; Sudook A. Kim;|
|Title:||Bulk-Moduli Systematics in Oxides, Including Superconductors|
|Published:||January 01, 2001|
|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|
|Publisher:||Handbook of Elastic Properties of Solids, Fluids, and Gases ,|
|Pages:||pp. 249 - 253|
|Keywords:||bulk modulus,elastic constants,oxide superconductors,oxides,superconductors,superending critical temperature|
|Research Areas:||Materials Science|
|PDF version:||Click here to retrieve PDF version of paper (3MB)|