Title: Dynamic properties of NH₃CH₂COOH·H₂PO₃ ferroelectric
Author(s):

	I.R. Zachek (Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv, Ukraine) ,
	R.R. Levitskii (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii St., 79011 Lviv, Ukraine) ,
	A.S. Vdovych (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii St., 79011 Lviv, Ukraine) ,
	O.B. Bilenka (Lviv Polytechnic National University, 12 Bandera St., 79013 Lviv, Ukraine)

Using a modified pseudospin model of NH₃CH₂COOH·H₂PO₃ ferroelectric taking into account the piezoelectric coupling with strains ε_i, 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

Full text [pdf]

<< List of papers