Ukrainian Journal of Physical Optics 

Number  2, Volume 5,  2004

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Effect of Illumination on the Dielectric Properties of Lead Molibdate Crystals 
Volnianskiy M.D., Kudzin A.Yu., Plyaka S.N. and Balasmeh Z.H.

Dnipropetrovsk National University, 49050 Dnipropetrovsk, Ukraine

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The influence of light illumination on the dielectric properties of PbMoO4 crystals is studied. The increase of the permittivity under illumination is revealed. The optical excitation spectrum of the permittivity is practically the same as that of the fluorescence and photoconductivity. The results for dependences of this “photo-dielectric effect” (p.d.e.) on the temperature, the frequency of measuring electric field, the samples thickness and the light intensity are presented. They show a close relation of the p.d.e. to the point defects of crystalline lattice. A possible mechanism for the p.d.e. is suggested.

Key words: lead molibdate, permittivity, photo-dielectric effect
PACS: 81.40 Tv.

doi 10.3116/16091833/5/2/51/2004
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