Static shell model calculation of electrostriction and third order elastic coefficients of perovskite oxides

1 October 1981

journal article
research article
Published by Taylor & Francis in Ferroelectrics

Vol. 37 (1) , 495-498
https://doi.org/10.1080/00150198108223465

Abstract

Lattice dynamical calculations of electrostriction and third order elastic coefficients have been performed on the basis of a shell model for BaTiO₃, SrTiO₃ (both in the cubic phase) and for KTaO₃. Harmonic and anharmonic interactions arising from the Coulomb forces and from n.n. short-range central forces are included. The calculations refer to a static crystal and are based on empirical model parameters determined by fitting to experimental input data obtained by linear extrapolation to absolute zero.

Keywords

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