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|Author(s):||H M. Ledbetter; Sudook A. Kim;|
|Title:||Bulk-Moduli Systematics in Oxides Including Superconductors|
|Published:||January 05, 2001|
|Abstract:||For oxides, including superconductors, we consider the systematics of the bulk-modulus/atomic-volume (B/Va) relationship. For nonsuperconducting oxides, the B-Va diagram shows that most oxides fall in three sets: (1) rocksalt crystal structure, AO; (2) perovskite crystal structure, ACO3; (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 Tl-O, higher B corresponds to higher Tc. Because the in-plane (CuO2-plane (CuO2-plane) compressibility probably varies little among these cuprates, the out-of-plane compressiblility 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|
|Research Areas:||Materials Science|
|PDF version:||Click here to retrieve PDF version of paper (534KB)|