New accurate technique for solving the LIMM equation and a comparison with other methods

Author

Lang, Sidney B.

Author_Institution

Dept. of Chem. Eng., Ben-Gurion Univ., Beer Sheva, Israel

fYear

2002

fDate

28 May-1 June 2002

Firstpage

25

Lastpage

28

Abstract

The Laser Intensity Modulation Method (LIMM) is widely used for the determination of the spatial distribution of polarization in ceramics, single crystals and polymers. The experimental data measured are pyroelectric currents as functions of frequency. The data analysis requires the numerical solution of a Fredholm integral equation of the 1st kind. This is an ill-posed problem that has multiple and very different solutions. In this paper, a new technique is proposed that gives the polarization. distribution in the form of a special 8th-degree polynomial. Both simulated and experimental data are analyzed with the new technique.

Keywords

Fredholm integral equations; dielectric polarisation; ferroelectric ceramics; measurement by laser beam; piezoceramics; polymers; pyroelectricity; Fredholm integral equation; LIMM equation solution technique; ceramics; data analysis; laser intensity modulation method; polarization spatial distribution determination; polarization. distribution; polymers; pyroelectric currents; single crystals; Ceramics; Crystals; Current measurement; Data analysis; Equations; Frequency measurement; Intensity modulation; Polarization; Polymers; Pyroelectricity;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2002. ISAF 2002. Proceedings of the 13th IEEE International Symposium on

ISSN

1099-4734

Print_ISBN

0-7803-7414-2

Type

conf

DOI

10.1109/ISAF.2002.1195861

Filename

1195861