𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Selfconsistent Lattice-Dynamical Theory of Structural Phase Transitions in Perovskite-Type Crystals

✍ Scribed by B. Pietrass

Publisher
John Wiley and Sons
Year
1972
Tongue
English
Weight
457 KB
Volume
53
Category
Article
ISSN
0370-1972

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The temperature dependence of the soft mode frequency and of the displacement parameter, associated with the structural phase transition in perovskite‐type crystals, is calculated from anharmonic lattice dynamics in a selfconsistent way. The theory describes the change‐over from the Landau‐type behaviour to critical behaviour near the phase transition. For SrTiO~3~ and LaAlO~3~ good agreement is obtained with the experimental data of Müller and Berlinger.

📜 SIMILAR VOLUMES

Structures, Compressibilities, and Phase
Structures, Compressibilities, and Phase Transitions of Ionic Crystals in a Quantum-Statistical ab Initio Theory
✍ M. Dubejko; S. Olszewski 📂 Article 📅 1971 🏛 John Wiley and Sons 🌐 English ⚖ 535 KB

## Abstract The structures of about 50 ionic crystals of cubic symmetry have been calculated in terms of a quantum‐statistical ab initio theory. In most cases agreement with experiment has been attained; in particular, the changes of the phases of alkali halides when the cation is replaced by a Cs