%0 Journal Article
%T CVM studies on the atomic ordering in complex perovskite alloys
%A Zhi-Rong Liu
%A Jian-She Liu
%A Bing-Lin Gu
%A Xiao-Wen Zhang
%J Physics
%D 2000
%I arXiv
%R 10.1103/PhysRevB.61.11918
%X The atomic ordering in complex perovskite alloys is investigated by the cluster variation method (CVM). For the 1/3\{111\}-type ordered structure, the order-disorder 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\}-type ordered structure, the ordering transition is the second order. Phase diagrams for both ordered structures are obtained. The order-disorder line obeys the linear law.
%U http://arxiv.org/abs/cond-mat/0005341v1