Abstract
Binary () and ternary () ferroelectrics-magnetics with the perovskite structure, containing the 3d-metal atoms, are investigated. Some correlations between their ferro- or antiferroelectric (T C) and magnetic (T N) phase transition temperatures and their interatomic A-O (), and B-O () bonds strains, determined with using of quasi-elastic structure model, have been constructed. The latter structural parameters and phase transition temperatures themselves influence on their T C-T N difference was revealed. Such correlations can help with the search for new solid solution systems between different ferroelectrics-magnets with enough high T C and T N and low T C-T N difference with using of apriori determined and values.
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