Phase diagram of mixed system of ferroelectric relaxors in the random field theory framework

B.Hilczer (Institute of Molecular Physics; E.A.Eliseev (Institute for Problems of Materials Science; Institute of Semiconductor Physics; Kiev; M.D.Glinchuk; Opole; Poland; Poland); Poznan; Ukraine)

arxiv: cond-mat/0007071 · v1 · submitted 2000-07-05 · ❄️ cond-mat.mtrl-sci

Phase diagram of mixed system of ferroelectric relaxors in the random field theory framework

M.D.Glinchuk , E.A.Eliseev (Institute for Problems of Materials Science , Kiev , Ukraine) , V.A.Stephanovich (Institute of Mathematics , University of Opole , Opole , Poland

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Institute of Semiconductor Physics B.Hilczer (Institute of Molecular Physics Poznan Poland)

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keywords fieldrandomdifferentferroelectricmixedmodelrelaxorstemperature

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We suggest a random field based model for calculation of physical properties of mixed ferroelectric relaxors. Our model naturally incorporates the different orientations of electric dipoles (related to different solid solution components) as well as the contribution of nonlinear and correlation effects of random field. We calculate the transition temperature $T_c$ as well as concentrational and temperature dependence of order parameters.

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Phase diagram of mixed system of ferroelectric relaxors in the random field theory framework

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