A universal order-disorder mechanism of structural phase transitions in a'a"BX4 compounds
Authors:
- Michał Kurzyński
Abstract
Experimental data concerning ferroelectric, ferroelastic and long-period spatially modulated phases in A'A"BX4 compounds are reviewed. It is shown that a simple statistical model wih two Ising spins on a hexagonal close-packed structure explains practically all the structural phase transitions observed in this class of compounds. The Ising variables describe four discrete orientational states of BX4 anions in the environment of A cations. Symmetrical nearest-neighbour interactions between spins stabilize various crystallographic structures with up to four formula units per elementary cell. Longer-period, as well as incommensurate modulations of the order parameter, both along the hexagonal axis and in the hexagonal plane, originate either from symmetrical next-nearest-neighbour or, competitively, antisymmetrical nearest-neighbour interactions. © 1994, Taylor & Francis Group, LLC. All rights reserved.
- Record ID
- UAM9bae1026733e4026949d2921246e5942
- Author
- Journal series
- Phase Transitions, ISSN 0141-1594
- Issue year
- 1994
- Vol
- 52
- Pages
- 1-56
- ASJC Classification
- ;
- DOI
- DOI:10.1080/01411599408201196 Opening in a new tab
- Language
- (en) English
- Score (nominal)
- 0
- Score source
- journalList
- Publication indicators
- = 11; = 11; : 2014 = 0.799; : 2006 (2 years) = 0.830 - 2007 (5 years) =0.630
- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/article/UAM9bae1026733e4026949d2921246e5942/
- URN
urn:amu-prod:UAM9bae1026733e4026949d2921246e5942
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.