Cluster-variation-method studies on the atomic ordering in complex perovskite alloys

Authors
Liu, ZR Liu, JS Gu, BL Zhang, XW
Citation
Zr. Liu et al., Cluster-variation-method studies on the atomic ordering in complex perovskite alloys, PHYS REV B, 61(18), 2000, pp. 11918-11921
Citations number
23
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
10980121 → ACNP
Volume
61
Issue
18
Year of publication
2000
Pages
11918 - 11921
Database
ISI
SICI code
1098-0121(20000501)61:18<11918:CSOTAO>2.0.ZU;2-7
Abstract
The atomic ordering in complex perovskite alloys is investigated by the clu ster variation method. For the 1/3{111}-type ordered structure, the order-d isorder phase transition is the first order, and the order parameter of the 1:2 complex perovskite reaches its maximum near x=0.25. For the 1/2{111}-t ype ordered structure, the ordering transition is the second order. Phase d iagrams for both ordered structures are obtained. The order-disorder line o beys the linear law.