A.model of cation ordering in A(B'_xB''_1-x)O_3 relaxors

Details A.model of cation ordering in A(B'_xB''_1-x)O_3 relaxors A.model of cation ordering in A(B'_xB''_1-x)O_3 relaxors

2000-10-20

arxiv.org/abs/cond-mat/0010323v1

Physics

Condensed Matter

13 pages in latex format, 6 ps figures. submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.63.054108

We have shown that the lattice-gas model with four repulsive pair interaction constants (corresponding to the four nearest coordination shells) on a simple cubic lattice is a sufficient model to describe the main types of cation ordering in relaxors. The phase diagram, obtained by the cluster variation method, shows the sequences of transitions between the phases 1:2 - 1:1 - disordered and 1:2 - disordered.

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