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Czasopismo
2013 | 11 | 2 | 206-212
Tytuł artykułu

Determination of the two dimensional distribution of the attempt relaxation times and activation energies from temperature dependence of dielectric dispersion

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
We present a method for numerical calculation of two dimensional distributions of the attempt relaxation times and activation energies from the temperature dependence of the experimental dielectric permittivity dispersion. We introduce empirical attempts to account for broad and/or asymmetric dispersions with the idea of using a weighted collection of Debye relaxation times. Then we present a modification of the aforementioned idea including attempt relaxation time and activation energy using the Arrhenius law, which significantly complicates the computation of the aforementioned distribution. Incorporating the activation energy and the attempt relaxation time into the equation transforms the discretized matrix equations into tensor equations. We rework the tensor equations into simpler matrix equations, thus permitting us to solve the presented discretized integral equation by using existing Least Distance Problem solving methods. Also, we present a regularization method and a way to choose the regularization parameter based on a best fit criterion. In the end we discuss the method showing some simulated results and experimental results. We then point out some problems involved in the calculations and propose methods to reduce their significance.
Wydawca

Czasopismo
Rocznik
Tom
11
Numer
2
Strony
206-212
Opis fizyczny
Daty
wydano
2013-02-01
online
2013-02-09
Twórcy
autor
  • Vilnius University Faculty of Physics, Saulėtekio 9, LT-10222, Vilnius, Lithuania, juras.banys@ff.vu.lt
  • Vilnius University Faculty of Physics, Saulėtekio 9, LT-10222, Vilnius, Lithuania
  • Semiconductor Physics Institute, A. Gostauto str. 11, LT-01108, Vilnius, Lithuania
  • Semiconductor Physics Institute, A. Gostauto str. 11, LT-01108, Vilnius, Lithuania
  • Fakultāt fūr Physik und Geowissenschaften der Universitāt Leipzig, Linnéstrasse 5, D-04103, Leipzig, Germany
Bibliografia
  • [1] P. Debye, Ver. Deut. Phys. Gesell 17, 777 (1913)
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  • [14] W. H. Press, S. A. Teukolsky, W. T. Vetterling, B. P. Flannery, Numerical Recipes in C, the Art of Scientific Computing (Cambridge University Press, Cambridge, 1994)
  • [15] A. Mikonis et al., Ferroelectrics 353, 154 (2007) http://dx.doi.org/10.1080/00150190701368117[Crossref]
  • [16] J. Banys, R. Grigalaitis, A. Mikonis, J. Macutkevic, P. Keburis, Physica Status Solidi C 6, 2725 (2009) http://dx.doi.org/10.1002/pssc.200982529[Crossref]
  • [17] J. C. Dyre, J. Phys. C Solid State 19, 5655 (1986) http://dx.doi.org/10.1088/0022-3719/19/28/016[Crossref]
  • [18] V. Maisonneuve, V. Cajipe, A. Simon, R. von der Muhll, J. Ravez, Phys. Rev. B 56, 10860 (1997) http://dx.doi.org/10.1103/PhysRevB.56.10860[Crossref]
  • [19] A. Džiaugys, J. Banys, J. Macutkevic, R. Sobiestianskas, Y. Vysochanskii, Physica Status Solidi A 207, 1960 (2010) http://dx.doi.org/10.1002/pssa.200925346[Crossref]
  • [20] A. Džiaugys et al., In: M. Lallart (Ed.), Ferroelectrics - Characterization and Modeling, (InTech, Rijeka, 2011), 153
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11534-012-0139-3
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