Alla Moina photo

EFFECT OF THE LONGITUDINAL MAGNETIC FIELD AND HYDROSTATICAL PRESSURE ON THE FERROELECTRICS FAMILY OF KD2 PO4

Alla Moina (Personal webpage)

Institute for Condensed Matter Physics, National Academy of Sciences of Ukraine

A microscopic model of the influence of the conjugate to the order parameter external fields-electric field E3 and shear stress σ6 -on deuterated KD2 PO4 -type ferroelectrics is presented. The major mechanisms for this influence are the splitting of the Slater-Takagi energies of the short-range correlations and the effective field created by piezoelectric coupling with shear strain σ6. The Tc vs σ6 phase diagram of KD2 PO4 is constructed, and the stress dependences of the dielectric, piezoelectric, and elastic characteristics associated with strain σ6 are discussed.