Photoinduced Effects in EPR Spectra of Copper Doped Potassium Tantalate

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The UV illumination effects in KTaO3 single crystals with Cu2+ impurity ions have been studied by electron paramagnetic resonance method. Single crystals both “as-grown” and thermally treated in oxygen atmosphere were investigated. It was found that the EPR signal of the Cu2+ centers decreases in the “as-grown” crystals during UV-irradiation at 365 nm, in the wholeinvestigated temperature range (3.7- 300 K). On the contrary, for the oxidized specimens a sizeable increase of the EPR signal of Cu2+ centers (except the signal from exchange coupled pair centers) is observed under UV illumination in some temperature regions.

Info:

Periodical:

Materials Science Forum (Volumes 514-516)

Edited by:

Paula Maria Vilarinho

Pages:

138-141

DOI:

10.4028/www.scientific.net/MSF.514-516.138

Citation:

A. G. Badalyan et al., "Photoinduced Effects in EPR Spectra of Copper Doped Potassium Tantalate", Materials Science Forum, Vols. 514-516, pp. 138-141, 2006

Online since:

May 2006

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$35.00

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