Conditions for stabilization of the ordered state of cations in complex oxides with perovskite structure |
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| Authors: | A Yu Gufan Yu V Prus V V Rumyantseva |
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| Institution: | (1) Research Institute of Physics, Rostov State University, pr. Stachki 194, Rostov-on-Don, 344090, Russia;(2) Moscow State Institute of Radio Engineering, Electronics, and Automation (Technical University), pr. Vernadskogo 78, Moscow, 119454, Russia |
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| Abstract: | Analytical expressions for the coefficients in the Landau potential for six types of ordering of complex oxides with perovskite structure in terms of the sums of ordering energies in different coordination spheres are obtained in the approximation of effective pair interactions. On the basis of the pair interaction potentials of the form v(r) = ?1/r6 + Acos(qr)/(qr)3, the conditions for q and R are established, which lead to stabilization of the ordered phases. |
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