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Low and high field sites of Cr3+ ions in calcium tetraborate glasses

机译:四硼酸钙玻璃中Cr3 +离子的低场和高场

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This paper presents electron paramagnetic resonance and detailed optical spectroscopic characterization of CaB4O7 glasses doped with Cr3+. The luminescence excitation spectrum consists of two broad bands related to transitions from the ground state (4)A(2g) to the excited states T-4(1g) and T-4(2g) of the octahedrally coordinated Cr3+ ions. The photoluminescence spectrum is a superposition of the R line related to the E-2(g) -> (4)A(2g) transition and broad band related to the T-4(2g) -> (4)A(2g) transition. The analysis of electron paramagnetic resonance spectra allowed to distinguish different Cr3+ sites, whereas the analysis of luminescence and luminescence excitation spectra allowed to characterize the crystal field distribution in the glass host. (C) 2016 Elsevier B.V. All rights reserved.
机译:本文介绍了掺杂有Cr3 +的CaB4O7玻璃的电子顺磁共振和详细的光谱表征。发光激发光谱由两个宽带组成,这些宽带与从八面体配位的Cr3 +离子的基态(4)A(2g)到激发态T-4(1g)和T-4(2g)的跃迁有关。光致发光光谱是与E-2(g)->(4)A(2g)跃迁相关的R线和与T-4(2g)->(4)A(2g)相关的宽带的叠加过渡。电子顺磁共振光谱的分析可以区分不同的Cr3 +位点,而发光光谱和发光激发光谱的分析可以表征玻璃基质中的晶体场分布。 (C)2016 Elsevier B.V.保留所有权利。

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