Optical absorption of Eu3+ and Eu2+ in europium oxides and europium fluorides

Victor F. Zinchenko; Ninel' P. Efryushina; O. G. Eryomin

doi:10.1117/12.475346

12 July 2002 Optical absorption of Eu ³⁺and Eu ²⁺in europium oxides and europium fluorides

Victor F. Zinchenko, Ninel' P. Efryushina, O. G. Eryomin

Proceedings Volume 4766, XI Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transition Metal Ions; (2002) https://doi.org/10.1117/12.475346
Event: XI Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transition Metal Ions, 2001, Kazan, Russian Federation

Abstract

Optical absorption of Eu³⁺ and Eu²⁺ ions in the polycrystalline europium oxides and fluorides was studied by the diffuse reflectance spectroscopy method. For all europium compounds, characteristic narrow peaks of 4f-4f electron transitions are observe. Their positions are rather independent upon the type of a compound. However, their intensity and number significantly vary, especially from the transition oxides to fluorides. In addition to those, shoulders of fundamental absorption in the oxide R_d- spectra of the oxide materials arise. Substitution of Eu²⁺ ions for Eu³⁺ ions in the EuF₃ - lattice causes a sharp change of the spectral characteristics. It is accompanied by an appearance of the wide band due to 4f-5d-electron transitions.

Citation Download Citation

Victor F. Zinchenko, Ninel' P. Efryushina, and O. G. Eryomin "Optical absorption of Eu ³⁺and Eu ²⁺in europium oxides and europium fluorides", Proc. SPIE 4766, XI Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transition Metal Ions, (12 July 2002); https://doi.org/10.1117/12.475346

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