The effect of hydrostatic pressure on thermodynamic characteristics of NH3CH2COOH·H2PO3 type ferroelectric materials

The model of NH3CH2COOH·H2PO3, modified by taking into account the piezoelectric coupling between the ordering structure elements and the strains εi, εj, is used for investigation of the effects that appear under external pressures. Within two-particle cluster approximation, the components of polari...

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Bibliographic Details
Published in:Condensed matter physics 2017, Vol.20 (4), p.43707, Article 43707
Main Authors: Zachek, I R, Levitskii, R R, Vdovych, A S
Format: Article
Language:English
Subjects:
Crystals
External pressure
Ferroelectric materials
Ferroelectricity
Hydrostatic pressure
Mathematical analysis
Phase transitions
Physical properties
Piezoelectricity
Pressure effects
Tensors
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Summary:The model of NH3CH2COOH·H2PO3, modified by taking into account the piezoelectric coupling between the ordering structure elements and the strains εi, εj, is used for investigation of the effects that appear under external pressures. Within two-particle cluster approximation, the components of polarization vector and static dielectric permittivity tensor of the mechanically clamped and free crystals, their piezoelectric and thermal characteristics are calculated. The effect of hydrostatic pressure on the phase transition and the calculated physical characteristics of the crystal is studied. A good quantitative description of experimental data for these crystals is obtained.
ISSN:1607-324X
2224-9079
DOI:10.5488/CMP.20.43707