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Structural Specific Features of Solid Solutions NdxGd1 – xCr3(BO3)4

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Abstract

Optical investigations of crystals of solid solutions NdxGd1 – xCr3(BO3)4, 0.01 ≤ x ≤ 1, have been performed. Absorption spectra in the range of wavenumbers 11 000–15 000 cm–1 recorded at cryogenic temperatures (16 K) reveal a significant effect of the concentration of Nd3+ ions in the structure on the absorption in the near infrared range of the spectrum due to  ff  transitions in the Nd3+ ion. It has been found that, at a concentration of х > 0.6, two nonequivalent Nd3+ centers are observed in the absorption spectra, which is explained by the presence of two polytypic modifications.

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ACKNOWLEDGMENTS

We are grateful to N.I. Leonyuk and V.V. Maltsev for the samples kindly provided for our study, N.V. Trubkin and A.V. Mokhov for the X-ray spectral microprobe analysis data used in this work. We would like to express our special gratitude to E.Yu. Borovikova, V.S. Kurazhkovskaya, and E.L. Belokoneva for valuable remarks.

Funding

This work was supported by the Russian Science Foundation (project no. 19-12-00413).

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Correspondence to K. N. Boldyrev.

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Translated by V. Rogovoi

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Boldyrev, K.N., Kuzmin, N.N. & Dobretsova, E.A. Structural Specific Features of Solid Solutions NdxGd1 – xCr3(BO3)4 . Opt. Spectrosc. 129, 37–41 (2021). https://doi.org/10.1134/S0030400X21010033

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