Photoinduced Effects in EPR Spectra of Copper Doped Potassium Tantalate
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 th...
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| Veröffentlicht in: | Materials science forum 2006-01, Vol.514-516, p.138-141 |
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| creator | Badalyan, Andréy G. Trepakov, V.A. Mozzati, Maria Cristina Jastrabik, Lubomir Hrabovsky, Miroslav Syrnikov, P.P. Rosa, Jan Galinetto, Pietro Azzoni, Carlo B. |
| description | 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. |
| doi_str_mv | 10.4028/www.scientific.net/MSF.514-516.138 |
| format | Article |
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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). 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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.</abstract><pub>Trans Tech Publications Ltd</pub><doi>10.4028/www.scientific.net/MSF.514-516.138</doi><tpages>4</tpages></addata></record> |
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| title | Photoinduced Effects in EPR Spectra of Copper Doped Potassium Tantalate |
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