Optical properties, defects, and composition of La 3 Ga 5.5 Ta 0.5 O 14  crystals

O. A. Buzanov; M. I. Voronova; E. V. Zabelina; A. P. Kozlova; N. S. Kozlova; E. A. Skryleva; D. A. Spassky; K. D. Shcherbachev

doi:10.1134/S0020168517050041

Optical properties, defects, and composition of La₃Ga_5.5Ta_0.5O₁₄ crystals

Autores: Buzanov O.A.¹, Voronova M.I.², Zabelina E.V.², Kozlova A.P.², Kozlova N.S.², Skryleva E.A.², Spassky D.A.²^,3, Shcherbachev K.D.²
Afiliações:
1. OAO Fomos-Materials
2. Moscow Institute of Steel and Alloys (National University of Science and Technology)
3. Skobeltsyn Institute of Nuclear Physics
Edição: Volume 53, Nº 5 (2017)
Páginas: 502-509
Seção: Article
URL: https://journals.rcsi.science/0020-1685/article/view/158220
DOI: https://doi.org/10.1134/S0020168517050041
ID: 158220

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Resumo

La₃Ga_5.5Ta_0.5O₁₄ crystals were grown in pure argon and in an argon + 2% oxygen atmosphere. The growth atmosphere significantly effects the elemental composition of the crystals, their color, and the genesis and intensity of absorption bands in the ultraviolet, visible, and infrared spectral regions. Two types of defects were identified in the crystals: planar interstitial defects and nearly spherical vacancy-type defects.

Palavras-chave

langatate, growth atmosphere, transmission spectra, defects, absorption bands, composition, structure, diffuse X-ray scattering, X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy, anisotropy

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