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Information × Registration Number 0214U002611, 0113U004633 , R & D reports Title Electromechanical nonlinearity of mixed ferro–antiferroelectric crystals of dihydrogen phosphate family popup.stage_title Head Levitskii Roman, Registration Date 21-01-2014 Organization Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine popup.description2 The microscopic theory for description of thermodynamic, dielectric, piezoelectric, and elastic properties of ferroelectric systems of the K1-х(NH4)хH2PO4 type that takes into account their structure, different types of interactions, and the piezoelectric coupling has been proposed. A theoretical investigation of the influence of external longitudinal electric field on the dielectric, piezoelectric, and elastic properties of the K1-х(NH4)хH2PO4 type systems has been performed. A microscopic model that takes into account the interactions between ordering pseudospins with switchable defect dipoles and rigid defects has been developed; using the example of Rochelle salt, the observed relaxational dispersion of the dielectric permittivity below 1 kHz has been described. Product Description popup.authors Вдович Андрій Степанович Моїна Алла Пилипівна Сороков Сергій Іванович popup.nrat_date 2020-04-02 Close