Condensed Matter Physics, 2018, vol. 21, No. 1, 13704
DOI:10.5488/CMP.21.13704
arXiv:1803.11428
Title:
Dynamic properties of NH3CH2COOH·H2PO3 ferroelectric
Author(s):
 
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I.R. Zachek
(Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv, Ukraine)
,
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R.R. Levitskii
(Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii St., 79011 Lviv, Ukraine)
,
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A.S. Vdovych
(Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii St., 79011 Lviv, Ukraine)
,
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O.B. Bilenka
(Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv, Ukraine)
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Using a modified pseudospin model of NH3CH2COOH·H2PO3 ferroelectric taking into account the piezoelectric coupling with
strains εi, ε4, ε5 and ε6 within Glauber method in two-particle claster approximation, we have calculated
components of dynamic dielectric permittivity tensor and relaxation times of the model. At the proper set of theory parameters, frequency and temperature dependences of the
components of permittivity and temperature dependences of the relaxation times are studied. A satisfactory agreement of the theoretical results with experimental data for
longitudinal permittivity is obtained.
Key words:
ferroelectrics, cluster approximation, dynamic dielectric permittivity, relaxation time
PACS:
77.22.-d, 77.22.Ch, 77.22.Gm
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