Bulk-Moduli Systematics in Oxides, Including Superconductors

Published

January 1, 2001

Author(s)

H M. Ledbetter, Sudook A. Kim

Abstract

For oxides, including superconductors, we consider the systematics fo the bulk-modulus/atomic-volume (B/V_α) relationship. For nonsuperconducting oxides, the B-V_{α diagram shows that most oxides fall in three sets: (1) rocksalt crystal structure, AO; (2) perovskite crystal structure, ACO}d3^; (3) transition-metal oxides ranging through stoichiometries of AO, A₃O₄. A₂O. Seventeen oxide superconductors show a surprisingly narrow V_a range and a relatively narrow range of B = 116 19 Gpa. B-V_a 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 T_c. Because the in-plane (CuO₂-plane) compressibility probably varies little among these cuprates, the out-of-plane compressibility should correlate inversely with T_c.

Citation

Bulk-Moduli Systematics in Oxides, Including Superconductors

Volume

II

Publisher Info

Handbook of Elastic Properties of Solids, Fluids, and Gases ,

Pub Type

Books

Download Paper

Local Download

Keywords

bulk modulus, elastic constants, oxide superconductors, oxides, superconductors, superending critical temperature

Citation

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 April 18, 2024)