EPR and Optical Absorption Investigations of Photochromic Effect in Nearly Stoichiometric LiNbO3:Fe

Abstract:

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EPR and optical absorption measurements have been performed on nearly stoichiometric lithium niobate single crystals with iron in traces and in 0.1% molar nominal amount. Thermal treatments in reducing atmosphere allowed to obtain samples with different Fe2+/Fe3+ ratios. The Fe2+/Fe3+ dynamic has been observed by irradiating the samples with UV and visible light in the temperature range 4-300 K: the photochromic effect resulted to be more evident in the strongly reduced crystals. A simple model to explain the photochromic behavior in nearly stoichiometric LiNbO3:Fe is proposed.

Info:

Periodical:

Materials Science Forum (Volumes 514-516)

Edited by:

Paula Maria Vilarinho

Pages:

152-155

DOI:

10.4028/www.scientific.net/MSF.514-516.152

Citation:

M. C. Mozzati et al., "EPR and Optical Absorption Investigations of Photochromic Effect in Nearly Stoichiometric LiNbO3:Fe", Materials Science Forum, Vols. 514-516, pp. 152-155, 2006

Online since:

May 2006

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$38.00

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