| 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 , |
| Volume: |
II |
| Pages: |
pp. 249 - 253 |
| Keywords: |
bulk modulus;elastic constants;oxide superconductors;oxides;superconductors |
| Research Areas: |
Materials Science |
| PDF version: |
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