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EnglishThe 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 whole investigated 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
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| Titolo: | Photoinduced effects in EPR spectra of copper doped potassium tantalate |
| Autori: | |
| Data di pubblicazione: | 2006 |
| Rivista: | |
| 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 whole investigated 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 |
| Handle: | http://hdl.handle.net/11571/106737 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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