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Optical spectroscopy of a La3Ga5SiO14:Co2+ crystal

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Abstract

The absorption, luminescence, and circular dichroism spectra of a cobalt-doped La3Ga5SiO14 crystal (Ca3Ga2Ge4O14 structure, sp. gr. P321) have been studied in the range 8–300 K. The Co2+ ion has been shown to occupy the 3f tetrahedral site. For T < 220 K, the 2 E(2 G) → 4 A 2 and 4 T 1(4 P) → 4 A 2 transitions of the tetrahedrally coordinated Co2+ ion are active in the luminescence spectrum. For T > 220 K, the 2 E(2 G) state is completely quenched, and only luminescence from the 4 T 1(4 P) level is observed.

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Authors and Affiliations

  1. Moscow Institute of Physics and Technology (State University), Institutskii per. 9, Dolgoprudnyi, Moscow oblast, 141700, Russia

    V. I. Burkov, L. N. Alyabyeva & Yu. V. Denisov

  2. Moscow State University, Moscow, 119899, Russia

    B. V. Mill’

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  1. V. I. Burkov
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  2. L. N. Alyabyeva
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  3. Yu. V. Denisov
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  4. B. V. Mill’
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Correspondence to V. I. Burkov.

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Original Russian Text © V.I. Burkov, L.N. Alyabyeva, Yu.V. Denisov, B.V. Mill’, 2014, published in Neorganicheskie Materialy, 2014, Vol. 50, No. 11, pp. 1210–1215.

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Burkov, V.I., Alyabyeva, L.N., Denisov, Y.V. et al. Optical spectroscopy of a La3Ga5SiO14:Co2+ crystal. Inorg Mater 50, 1119–1124 (2014). https://doi.org/10.1134/S0020168514110041

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  • DOI: https://doi.org/10.1134/S0020168514110041

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