Photoinduced Effects in EPR Spectra of Copper Doped Potassium Tantalate

Andréy G. Badalyan; Carlo B. Azzoni; Pietro Galinetto; Maria Cristina Mozzati; Lubomir Jastrabik; Jan Rosa; Miroslav Hrabovsky; P.P. Syrnikov; V.A. Trepakov

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

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EPR and TEM Characterization of Electroluminescent Alq₃
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Photoinduced Effects in EPR Spectra of Copper Doped Potassium Tantalate
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New Fluorescent Heterocyclic Materials: Synthesis, Solvatochromic and Fluorescence Properties
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HomeMaterials Science ForumMaterials Science Forum Vols. 514-516Photoinduced Effects in EPR Spectra of Copper...

Photoinduced Effects in EPR Spectra of Copper Doped Potassium Tantalate

Abstract:

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.

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Periodical:

Materials Science Forum (Volumes 514-516)

Pages:

138-141

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.514-516.138

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Online since:

May 2006

Authors:

Andréy G. Badalyan, Carlo B. Azzoni, Pietro Galinetto, Maria Cristina Mozzati, Lubomir Jastrabik, Jan Rosa, Miroslav Hrabovsky, P.P. Syrnikov, V.A. Trepakov

Keywords:

Copper Impurity, EPR, Potassium Tantalate

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