Thermodynamic properties of ferroelectric NH 3 CH 2 COOH·H 2 PO 3 crystal

Deformation effects in glycinium phosphite ferroelectric

“…The model of deformed GPI crystal [38] made it possible to correctly describe polarization and components of dielectric permittivity tensor for a mechanically free and clamped crystal, its piezoelectric, elastic characteristics and heat capacity, influence of longitudinal field E y [39], hydrostatic pressure [40] and uniaxial pressures [41] on these characteristics, as well as relaxation phenomena [42].…”

“…The effects of different mechanical stresses on the phase transition, dielectric and piezoelectric characteristics of this crystal are studied. [38].…”

Dynamic properties of NH_3CH_2COOH·H_2PO_3 ferroelectric

“…The pseudospin model proposed in [5] considers the system of protons in GPI, localized on O-H. . .O bonds between phosphite groups HPO 3 , which form chains along the crystallographic c-axis of the crystal (figure 1).…”

“…As a result, in [1,3] there was proposed a model of GPI crystal with proton ordering, within which the main peculiarities of its dielectric permittivity were explained qualitatively. Later, this model was supplement by taking into account the piezoelectric coupling of proton and lattice subsystems [5], which made it possible to calculate thermal, piezoelectric and elastic characteristics of GPI. At the proper set of theory parameters, a good agreement of the obtained theoretical results with corresponding experimental data for the crystals of this type was obtained.…”

“…The aim of this paper is to study the relaxation phenomena in GPI and explain the available experimental data [8][9][10][11] for longitudinal dynamic characteristics within the proton ordering model proposed in [5].…”