Phases Coexistence of Hydrogen-Bonded Mixed Ferroelectric and Antiferroelectric Crystals

Трыбула, З.; Kaszyński, J.

doi:10.1080/00150190490423859

Cited by 5 publications

(7 citation statements)

References 16 publications

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“…At the same time ε 11 (T, ν) has two maxima at T c (x) and T g (x). The same behavior was experimentally detected also for ε 11 (T, ν) and [16,18,51,52], and…”

Section: The Ferroelectric Phase Composition Regionsupporting

confidence: 58%

Thermodynamics, dielectric permittivity and phase diagrams of the Rb_{1-x}(NH_{4})_{x}H_{2}PO_{4} type proton glasses

Sorokov¹,

Levitskii²,

Vdovych³

2010

Condens. Matter Phys.

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The cluster pseudospin model of proton glasses, which takes into account the energy levels of protons around the PO 4 group, the long-range interactions between the hydrogen bonds, and an internal random deformational field is used to investigate thermodynamical characteristics, longitudinal and transverse dielectric permittivities of Rb 1−x (ND 4 )xD 2 PO 4 and Rb 1−x (NH 4 )xH 2 AsO 4 compounds. A review of experimental and theoretical works on the Rb 1−x (NH 4 )xH 2 PO 4 type crystals is presented.

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“…At the same time ε 11 (T, ν) has two maxima at T c (x) and T g (x). The same behavior was experimentally detected also for ε 11 (T, ν) and [16,18,51,52], and…”

Section: The Ferroelectric Phase Composition Regionsupporting

confidence: 58%

Thermodynamics, dielectric permittivity and phase diagrams of the Rb_{1-x}(NH_{4})_{x}H_{2}PO_{4} type proton glasses

Sorokov¹,

Levitskii²,

Vdovych³

2010

Condens. Matter Phys.

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“…Simultaneously the temperature hysteresis ∆T C decreases with increased ADP concentration. The obtained results in comparison with literature data [6][7][8][9][10][11] for the bulk KADP are presented in Table 1.…”

Section: Resultsmentioning

confidence: 60%

“…At RT the [6][7][8][9][10][11] Present work KADP nanoparticles crystal structure of KADP embedded into the pores corresponds to the bulk structure. The average nanoparticle diameters are equal to ∼53(5) nm for the pure KDP nanoparticles, 49(2) nm for the sample with 5 % of ADP and 46(2) nm for 15 % of ADP.…”

Section: Resultsmentioning

confidence: 99%

Phase transitions in nanostructured K1-x(NH4)(x)H2PO4 (x = 0 – 0.15) solid solutions

Vanina¹,

Набережнов²,

Алексеева³

et al. 2017

Nanosystems: Phys. Chem. Math.

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Effect of ammonium dihydrogen phosphate admixture on phase transitions in nanostructured solid solutions (1 − x)KH 2 PO 4 -(x)(NH 4 )H 2 PO 4 at x = 0, 0.05 and 0.15 has been studied by dielectric spectroscopy. The samples have been prepared by embedding of aqueous solutions into porous borosilicate glasses. The X-ray diffraction have shown that the crystal structure at room temperature corresponds to the bulk KDP and the average nanoparticle diameters are 49 (2) nm for the sample with 5 % of (NH 4 )H 2 PO 4 (ADP) and 46 (2) nm for the nanocomposites with 15 % of ADP. Dielectric response data analysis have revealed the shifts of the ferroelectric phase transition temperature as a function of (NH 4 )H 2 PO 4 concentration: at x = 0 ∆T C is equal to ∼6 K, at x = 0.05 ∆T C ∼3 K and at x = 0.15 ∆T C ∼2 K.

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“…Dynamic susceptibility χ aa (ω, T ) of the system is expressed via dynamic eigenvaluesη µ (ω) (50) like in the static case (27) after the replacementη µ →η µ (ω).…”

Section: Relaxational Dynamics Of the Rb 1−x (Nh 4 ) X H 2 Po 4 Type mentioning

confidence: 99%

“…The most complete experimental data for Rb 1−x (NH 4 ) x H 2 AsO 4 for the dielectric measurements in a wide frequency range at low temperatures can be found in [23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics and complex dielectric permittivity of mixed crystals of the Rb_{1-x}(NH_{4})_{x}H_{2}PO_{4} type

Levitsky¹,

Sorokov²,

Stankowski³

et al. 2008

Condens. Matter Phys.

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We propose a pseudospin model for proton glasses of the Rb 1−x (NH 4 )xH 2 PO 4 (Rb 1−x (ND 4 )xD 2 PO 4 ) type, which takes into account the energy levels of hydrogens (deuterons) around the PO 4 group, long-range interactions between the hydrogen bonds, and an internal random deformational field. Within the framework of a cluster approximation and a mean field approximation over the long-range interactions, we derive a system of equations for the state parameters for the regions which are in the ferroelectric and antiferroelectric states, as well as in the proton glass state. Within the Glauber dynamics approach, we obtain a system of equations for the frequency-dependent linear responses of polarization and the proton glass order parameter. We obtain a qualitative description of the temperature behavior of dielectric permittivities of the K 1−x (ND 4 )xD 2 PO 4 and Rb 1−x (NH 4 )xH 2 AsO 4 compounds at different frequencies. The origin of low-temperature peak in the imaginary part of dielectric permittivity in proton glasses is discussed.

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Phases Coexistence of Hydrogen-Bonded Mixed Ferroelectric and Antiferroelectric Crystals

Cited by 5 publications

References 16 publications

Thermodynamics, dielectric permittivity and phase diagrams of the Rb_{1-x}(NH_{4})_{x}H_{2}PO_{4} type proton glasses

Thermodynamics, dielectric permittivity and phase diagrams of the Rb_{1-x}(NH_{4})_{x}H_{2}PO_{4} type proton glasses

Phase transitions in nanostructured K1-x(NH4)(x)H2PO4 (x = 0 – 0.15) solid solutions

Thermodynamics and complex dielectric permittivity of mixed crystals of the Rb_{1-x}(NH_{4})_{x}H_{2}PO_{4} type

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