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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 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
Volume
II
Publisher Info
Handbook of Elastic Properties of Solids, Fluids, and Gases ,

Keywords

bulk modulus, elastic constants, oxide superconductors, oxides, superconductors

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=851170 (Accessed April 18, 2024)
Created January 5, 2001, Updated February 19, 2017