Physics – Condensed Matter – Materials Science
Scientific paper
2008-04-10
Physics
Condensed Matter
Materials Science
9 pages pdflatex, 21 embedded png figs
Scientific paper
10.1140/epjb/e2008-00327-2
We formulate an effective model for B-B' site ordering in double perovskite materials A_2BB'O_6. Even within the simple framework of lattice-gas type models, we are able to address several experimentally observed issues including nonmonotonic dependence of the degree of order on annealing temperature, and the rapid decrease of order upon overdoping with either B or B' species. We also study ordering in the `ternary' compounds A_2BB'_{1-y}B''_yO_6 Although our emphasis is on the double perovskites, our results are easily generalizable to a wide variety of binary and ternary alloys.
Majumdar Pinaki
Sanyal Prabuddha
Tarat Sabyasachi
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