Перегляд за автором "Moina, A.P."

Результати 1-13 з 13

Electrocaloric effect in KH₂PO₄ family crystals

Vdovych, A.S.; Moina, A.P.; Levitskii, R.R.; Zachek, I.R. (Condensed Matter Physics, 2014)

The proton ordering model for the KH₂PO₄ type ferroelectrics is modified by taking into account the dependence of the effective dipole moments on the proton ordering parameter. Within the four-particle cluster approximation ...
Isotopic effects in partially deuterated piezoelectric crystals of Rochelle salt

Levitskii, R.R.; Zachek, I.R.; Moina, A.P.; Andrusyk, A.Ya. (Condensed Matter Physics, 2004)

We develop a theory for dielectric, piezoelectric, and elastic properties of partially deuterated (quenched disorder) crystals of Rochelle salt with taking into account the piezoelectric coupling. Results of numerical ...
Longitudinal dielectric relaxation in KD₂PO₄ under hydrostatic pressure

Levitskii, R.R.; Zachek, I.R.; Moina, A.P.; Duda, A.S. (Condensed Matter Physics, 2002)

Within the model proposed earlier, we study the effect of hydrostatic pressure on relaxational dynamics of deuterated KD₂PO₄ type ferroelectrics. Within the four particle approximation for deuteron ordering model and ...
Longitudinal relaxation of mechanically free KH₂PO₄ type crystals. Piezoelectric resonance and sound attenuation

Levitskii, R.R.; Zachek, I.R.; Moina, A.P.; Vdovych, A.S. (Condensed Matter Physics, 2008)

Within the framework of proton model with taking into account the piezoelectric interaction with the shear strain ε₆, a dynamic dielectric response of KD₂PO₄ type ferroelectrics is considered. Experimentally observed phenomena ...
Longitudinal relaxation of ND₄D₂PO₄ type antiferroelectrics. Piezoelectric resonance and sound attenuation

Levitskii, R.R.; Zachek, I.R.; Moina, A.P.; Vdovych, A.S. (Condensed Matter Physics, 2009)

Within the framework of the modi ed proton model with taking into account the interaction with the shear strain ε6, a dynamic dielectric response of ND₄D₂PO₄ type antiferroelectrics is considered. Dynamics of the ...
Major physical characteristics of Rochelle salt: the role of thermal strains

Moina, A.P. (Condensed Matter Physics, 2012)

We compare the results for the related to the shear strain ε₄ physical characteristics of Rochelle salt obtained within the recently developed modified two-sublattice Mitsui model that takes into account the strain ε₄ and ...
Mitsui model with diagonal strains: A unified description of external pressure effect and thermal expansion of Rochelle salt NaKC₄H₄O₆·4H₂O

Moina, A.P.; Levitskii, R.R.; Zachek, I.R. (Condensed Matter Physics, 2011)

We elaborate a modification of the deformable two-sublattice Mitsui model of [Levitskii R.R. et al., Phys. Rev. B. 2003, 67, 174112] and [Levitskii R.R. et al., Condens. Matter Phys., 2005, 8, 881] that consistently takes ...
Monoclinic elastic and piezoelectric properties of Rochelle salt. Description within the modified Mitsui model

Levitskii, R.R.; Zachek, I.R.; Moina, A.P. (Condensed Matter Physics, 2005)

We propose a modification of the two-sublattice Mitsui model that takes into account a coupling with diagonal components of the strain tensor. Within the developed model, we calculate the piezoelectric and elastic ...
Pressure effect upon the dielectric response of KDP family crystals

Stasyuk, I.V.; Levitskii, R.R.; Moina, A.P. (Condensed Matter Physics, 1999)

Within the four-particle cluster approximation for the proton ordering model, we study the effects of external pressures (which do not lower the crystals' symmetry) upon static and dynamic dielectric properties of ...
Role of piezoelectricity in dielectric response of Rochelle salt type crystals

Levitskii, R.R.; Zachek, I.R.; Verkholyak, T.M.; Moina, A.P. (Condensed Matter Physics, 2003)

Comparing the spontaneous polarizations, static and dynamic dielectric properties of piezoelectric Rochelle salt and non-piezoelectric RbHSO₄ we explore the role played by piezoelectric coupling in forming the ...
The effect of external factors on dielectric permittivity of Rochelle salt: humidity, annealing, stresses, electric field

Slivka, A.G.; Kedyulich, V.M.; Levitskii, R.R.; Moina, A.P.; Romanyuk, M.O.; Guivan, A.M. (Condensed Matter Physics, 2005)

The effect of external factors, such as dessicating/wetting, thermal annealing, uniaxial and hydrostatic pressure, on the dielectric permittivity of Rochelle salt crystals is investigated. The obtained results are ...
The influence of hydrostatic pressure on DADP-type antiferroelectrics

Levitskii, R.R.; Moina, A.P. (Condensed Matter Physics, 1998)

We study the effects of hydrostatic pressures on deuterated ND₄D₂PO₄ type antiferroelectric crystals. Within the four-particle cluster approximation the free energy of the crystals is calculated, and an equation for ...
Transition temperature in KDP type crystals under external pressures. Role of H-bond geometry

Levitskii, R.R.; Moina, A.P.; Zachek, I.R. (Condensed Matter Physics, 1999)

Within the four-particle cluster approximation for the proton ordering model, we study effects of external pressures which do not lower the symmetry of crystals on deuterated ferroelectrics and antiferroelectrics of ...

Результати 1-13 з 13

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Перегляд за автором "Moina, A.P."

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