he high temperature behavior of Electron Paramagnetic Resonance (EPR) signals of Cu2+ centers and Cu2+-Cu2+ exchanged coupled pair centers in potassium tantalate (KTaO3, and related K1-xLixTa1-yNbyO3) single crystals has been studied. EPR signals were observed in the range of 300-1000 K. The dynamic behavior of oxygen vacancies and the influence of its on Cu2+ ions EPR spectra were found. A model for divalent impurity ions in the potassium tantalate crystal is proposed.
Association of impurities and vacancies in copper doped potassium tantalate crystals studied by EPR
AZZONI, CARLO;GALINETTO, PIETRO;MOZZATI, MARIA CRISTINA;
2003-01-01
Abstract
he high temperature behavior of Electron Paramagnetic Resonance (EPR) signals of Cu2+ centers and Cu2+-Cu2+ exchanged coupled pair centers in potassium tantalate (KTaO3, and related K1-xLixTa1-yNbyO3) single crystals has been studied. EPR signals were observed in the range of 300-1000 K. The dynamic behavior of oxygen vacancies and the influence of its on Cu2+ ions EPR spectra were found. A model for divalent impurity ions in the potassium tantalate crystal is proposed.File in questo prodotto:
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