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Proceedings Paper

Picosecond autowaves near phase transition temperature of the order-disorder-type ferroelectrics
Author(s): S. V. Nesterov; Sergei V. Sazonov
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Paper Abstract

In the present work a new phenomenological approach to the accounting for relaxation near the phase transition temperature of the order-disorder type ferroelectric have been proposed. This approach is presented in the framework of pseudospin formalism and is based on the analogies with like those accounting for in para- and ferromagnetics. A relation between phase relaxation time of the critical vibrations, frequency of tunneling oscillations and the average constant of dipole-dipole interactions (or phase transition temperature) is found. This relation was obtained by use of mean field approximation. From differential equations for pseudospin components the Landau-Khalatnikov like equation for macroscopic ferroelectric polarization has been obtained. Self-consistence investigation of the last non-linear equation and Maxwell's equations is carried out in the low-frequency nonresonant regime. It is shown that in paraphase the dynamics of picosecond electromagnetic perturbations yields to the modified Korteweg-de Vries- Burgers equation. At the same time in ferroelectric phase these perturbations are described by the Korteweg-de Vries- Burgers equation. It is shown that electromagnetic shock wave and autowave formation near phase transition temperature is possible.

Paper Details

Date Published: 4 April 1997
PDF: 6 pages
Proc. SPIE 3093, Nonresonant Laser-Matter Interaction (NLMI-9), (4 April 1997); doi: 10.1117/12.271701
Show Author Affiliations
S. V. Nesterov, Kaliningrad State Univ. (Russia)
Sergei V. Sazonov, Astrakhan State Technical Univ. (Russia)


Published in SPIE Proceedings Vol. 3093:
Nonresonant Laser-Matter Interaction (NLMI-9)
Vitali I. Konov; Mikhail N. Libenson, Editor(s)

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