Characterization of Ferroelectric Phase Transition in GPI Crystal

Tchukvinskyi, R.; Cach, R.; Czapla, Z.; Dacko, S.

doi:10.1002/(sici)1521-396x(199801)165:1<309::aid-pssa309>3.3.co;2-l

Cited by 10 publications

(18 citation statements)

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“…One can see that the account for ( ) at the zero electric field leads to increasing the permittivities in 12 -4.00; ◁. Symbols are experimental data taken from [11] the ferroelectric phase and does not influence them in the paraelectric phase. The influence of a longitudinal electric field on the temperature dependence of the dielectric permittivity 22 of a GPI crystal is presented in Fig.…”

Section: Comparison Of Theoretical Results With Experimental Datamentioning

confidence: 99%

“…Moreover, on the basis of a modified model of GPI, we quantitatively properly described the influence of transverse fields and [8], hydrostatic [9] and uniaxial [10] pressures on the phase transition and thermodynamic characteristics of GPI crystal. Experimental data [11] show that, in the presence of a longitudinal field , the phase transition smears, and the temperature dependence of the longitudinal permittivity ( ) has rounded maximum. At the same time, in the model proposed in [7], the effective dipole moments with different values of longitudinal components in the para-and ferroelectric phases are used for the description of the longitudinal dielectric permittivity .…”

Section: Introductionmentioning

confidence: 99%

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Influence of Longitudinal Electric Field on Thermodynamic Properties of NH3CH2COOH·H2PO3 Ferroelectric

2018

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Using a modified model of ferroelectric glycine phosphite by considering the piezoelectric coupling with strains e1 within the two-particle cluster approximation, the expressions for the polarization vector, static dielectric permittivity tensor, piezoelectric coefficients, and elastic constants of the crystal in the presence of a longitudinal electric field E2 are calculated. An analysis of the influence of this field on thermodynamic characteristics of the crystal is carried out. The dependence of effective dipole moments on order parameters is taken into account. This allowed us to agree the effective dipole moments in the ferro- and paraelectricphases and to describe the smearing of phase transition under the influence of an electric field. The satisfactory quantitative description of the available experimental data for these characteristics has been obtained at the proper choice of the model parameters.

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Section: Comparison Of Theoretical Results With Experimental Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Longitudinal Electric Field on Thermodynamic Properties of NH3CH2COOH·H2PO3 Ferroelectric

2018

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“…Glycine being a simplest amino acid easily forms compounds with selected inorganic and organic species. One such compound is glycine phosphite with chemical formula NH 3 CH 2 COO.H 3 PO 3 , identified as a good ferroelectric material [1][2][3][4][5]. Glycine phosphite undergoes a continuous paraelectric-ferroelectric phase transition at 225 K. Earlier reports confirm its very strong ferroelectric effects compared to the conventional organic materials and also its strong piezoelectric and pyroelectric properties [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, growth, morphology and characterization of ferroelectric glycine phosphite single crystals

Devi

Srinivasan

2011

Cryst. Res. Technol.

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Glycine phosphite (NH 3 CH 2 COO.H 3 PO 3 ), a potential ferroelectric material, was grown as single crystals from aqueous solutions by slow evaporation and slow cooling methods. Laboratory synthesized title compound was purified by recrystallization method and confirmed by Fourier transform infrared and Laser Raman studies. Temperature dependent solubility in double distilled water in the range between 288 and 328 K was determined by gravimetric method. Morphological importance of various growth faces were studied by optical goniometry. Powder x-ray diffraction study performed on the grown crystals confirms the crystal system and lattice parameters of the unit cell. Optical transparency of the grown crystals in the ultraviolet -visible -near infrared region was studied by spectroscopic method. Thermal stability of the grown crystals in the temperature region above ambient until melting was studied using differential scanning calorimetry.

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“…As the phase transition in GPI is considered a tricritical one (P s (T) ∝ (T c − T) β , β = 0.25) [10], the phonon frequency as a function of the temperature can be written as follows:…”

Section: Of Ref 1) and Modifies The Wavenumber Of The P O Modesmentioning

confidence: 99%

Ferroelectric Phase in Glycinium Phosphite Studied by Raman Scattering

et al. 2005

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In this work we present a detailed study of the temperature evolution (290 K-20 K) of the polarized Raman spectra in a single crystal of glycinium phosphite. The phase transition manifests itself by the activation of new Raman bands and by the occurrence of anomalies in the temperature dependence of the wavenumber of some external and internal modes. The results show that occurring deformations in molecular units contribute relevantly to the spontaneous polarization in GPI. The anomalous behaviour of the wavenumber and of the damping constant of some bands is in good agreement with a theoretical model based in a pseudospin-phonon interaction.

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Characterization of Ferroelectric Phase Transition in GPI Crystal

Cited by 10 publications

References 0 publications

Influence of Longitudinal Electric Field on Thermodynamic Properties of NH3CH2COOH·H2PO3 Ferroelectric

Influence of Longitudinal Electric Field on Thermodynamic Properties of NH3CH2COOH·H2PO3 Ferroelectric

Synthesis, growth, morphology and characterization of ferroelectric glycine phosphite single crystals

Ferroelectric Phase in Glycinium Phosphite Studied by Raman Scattering

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