Thermodynamics and dynamical properties of the KH₂PO₄ type ferroelectric compounds. A unified model

RR Levitskii, IR Zachek, AS Vdovych… - Condensed matter …, 2009 - dspace.nbuv.gov.ua
Within the framework of the proposed uni ed proton ordering model for the ferroelectric
compounds of the KH₂PO₄ family, in the four-particle cluster approximation for the short …

Theory of related to shear strain u6 physical properties of ferroelectrics and antiferroelectrics of the KH2PO4 family

RR Levitskii, BM Lisnii - physica status solidi (b), 2004 - Wiley Online Library
We propose an extension of the proton tunneling model in order to study related to the shear
strain u6 dielectric, piezoelectric, and elastic properties of ferro‐and antiferroelectrics of the …

Influence of external factors on dielectric permittivity of Rochelle salt: humidity, annealing, stresses, electric field

AG Slivka, VM Kedyulich, RR Levitskii… - arxiv preprint cond-mat …, 2005 - arxiv.org
The present work contains results of experimental investigation of external factors, such as
dessicating/wetting, thermal annealing, uniaxial and hydrostatic pressures on dielectric …

Isotopic effects in partially deuterated piezoelectric crystals of Rochelle salt

RR Levitskii, IR Zachek, AP Moina… - Condensed Matter …, 2004 - dspace.nbuv.gov.ua
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 …

[PDF][PDF] Longitudinal dielectric, piezoelectric, elastic, and thermal characteristics of the KH2PO4 type ferroelectrics

RR Levitskii, IR Zachek, AS Vdovych… - Журнал фізичних …, 2010 - irbis-nbuv.gov.ua
Within the framework of the modified proton ordering model for the KH2PO4 type with taking
into account a linear in strain ε6 contribution to the proton subsystem energy but without …

Influence of electric field E 3 and mechanical shear stress σ 6 on KH2PO4 crystal ferroelectric phase transition

BM Lisnii, RR Levitskii, OR Baran - Phase Transitions, 2007 - Taylor & Francis
Within the theory due to Levitskii and Lisnii (2004), which takes into account short-range and
long-range interactions, proton tunnelling, and piezoelectric coupling, we explore the …

Longitudinal relaxation of mechanically clamped KH_ {2} PO_ {4} type crystals

RR Levitskii, IR Zachek, AS Vdovych - arxiv preprint arxiv:1210.2226, 2012 - arxiv.org
Within the framework of a modified proton ordering model of the KH_ {2} PO_ {4} family
ferroelectric crystals, taking into account a linear over the strain\varepsilon_ {6} contribution …

Theoretical investigations of thermodynamic properties of partially deuterated K (H₁₋ xDx) ₂PO₄ ferroelectrics

RR Levitskii, BM Lisnii… - Condensed Matter …, 2007 - dspace.nbuv.gov.ua
The research of thermodynamic properties of partially deuterated K (H₁₋ xDx) ₂PO₄
crystals was performed within the framework of proton ordering model with tunnelling within …

Dielectric, Electromechanical, and Elastic Properties of K1−x(NH4)xH2PO4 Compounds

R Levitskii, I Zachek, A Vdovych, L Korotkov… - …, 2015 - Taylor & Francis
We present the results of the thermodynamic theory of piezoelectric ferroelectrics and of the
phenomenological theory of thermodynamic characteristics of the KH2PO4 type …

Thermodynamics and Dielectric Properties of Rb(H1−x D x )2PO4 Mixed Ferroelectrics

RR Levitskii, AY Andrusyk, BM Lisnii - Ferroelectrics, 2004 - Taylor & Francis
We researched the Rb (H1− xDx) 2PO4 mixed crystals within the framework of the proton
ordering model. For the proton ordering model with and without tunnelling in the four-particle …