Abstract
Spectroscopic studies of Eu-doped BaF2 single crystals were carried out in view of novel possible applications in laser technology. Single-crystal X-ray diffraction confirmed that the Eu: BaF2 single crystal process FCC crystal structure with Fm-3m space group. The vibrational mode of the Eu: BaF2 crystal was observed at 245 cm−1. Five absorption lines are observed at 398, 405, 415,462, and 471 nm, corresponding to the 7F0 → 5L6, 7F1 → 5L6, 7F1 → 5D3, 7F0 → 5D2, and 7F1 → 5D2 transitions, respectively. The 7F0 → 5L6 transition has a maximum absorbance and oscillator strength of ~ 2.03 × 10–6. The fluorescence spectra showed four emission lines at 588, 618, 652, and 699 nm. These lines correspond to 5D0 → 7F1, 5D0 → 7F2, 5D0 → 7F3, and 5D0 → 7F4 transitions, respectively. Judd–Ofelt parameters were calculated from the fluorescence spectra using JOES software. Eu is localized at a highly symmetric site, as the JO intensity parameter Ω2 (0.54 × 10−20cm2) is less than Ω4 (0.99 × 10–20 cm2). The emission cross-section values, branching ratio, lifetime, and radiation transition probability have been computed using the JOES software. The 7D0 → 7F1 transition has a higher lifetime, branching ratio, and emission cross-section values.
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Acknowledgements
The authors acknowledge Dr. Subhash Chandra Sahoo, Department of Chemistry, Punjab University Chandigarh for providing facilities for Single Crystal XRD measurements and Material Research Centre, Malaviya National Institute of Technology (MNIT), Jaipur for measurement photoluminescence and Central Instrumentation Lab (CIL), Guru Jambheshwar University of Science & Technolgy, Hisar for Raman spectra or UV- Visible spectrum.
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RK: conceptualization, investigation, methodology, formal analysis, writing—original draft. DJ: conceptualization, methodology, validation, writing—review and editing, supervision.
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Kumar, R., Joseph, D. Spectroscopic studies of Eu-Doped BaF2 single-crystal. J Opt (2024). https://doi.org/10.1007/s12596-024-01838-6
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DOI: https://doi.org/10.1007/s12596-024-01838-6