| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Crystal growth, structure and crystal field splitting and fitting of Yb:GdScO3 |
| Jia-Hong Li(李加红)1,2,3, Qing-Li Zhang(张庆礼)1,3,†, Gui-Hua Sun(孙贵花)1,3,‡, Jin-Yun Gao(高进云)1,3, Ren-Qin Dou(窦仁勤)1,3, Xiao-Fei Wang(王小飞)1,3, and Shou-Jun Ding(丁守军)1,3,4 |
1 Key Laboratory of Photonic Devices and Materials of Anhui Province, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China;
2 University of Science and Technology of China, Hefei 230026, China;
3 Advanced Laser Technology Laboratory of Anhui Province, Hefei 230026, China;
4 School of Science and Engineering of Mathematics and Physics, Anhui University of Technology, Maanshan 243002, China |
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Abstract A good quality (5 at.% Yb:GdScO$_{3}$) single crystal of $\varPhi30 {\rm mm}\times 37$ mm was grown successfully by the Czochralski method. Its structure is studied by the x-ray diffraction (XRD), and its atomic coordinates are obtained by Rietveld refinement. The crystal field energy level splitting of Yb$^{3+}$ in GdScO$_{3}$ is determined by employing the absorption and photoluminescence spectra at 8 K. Only $^{2}$F$_{7/2}$(4) is far from the ground state $^{2}$F$_{7/2}$(1) by 710 cm$^{-1}$ among the crystal field energy levels split from $^{2}$F$_{7/2}$, so it is more easier to realize the laser operation of $^{2}$F$_{5/2}$(1)$\to^{2}$F$_{7/2}$(4) with wavelength 1060 nm. The spin-orbit coupling parameters and intrinsic crystal field parameters (CFPs). The intrinsic crystal field parameters $\bar{B}_{k}$ ($k=2$, 4, 6) of the crystal were fitted by the superposition model. The CFPs evaluated with $\bar{B}_{k}$ and coordination factor are taken as the initial parameters to fit the crystal field energy levels of the crystal, and the crystal field parameters ${B}^{k}_{q}$ are obtained finally with the root-mean-square deviation 9 cm$^{-1}$. It is suggested that the ligand point charge, covalency and overlap interaction are slightly weaker than charge interpenetration and coulomb exchange interaction for Yb$^{3+}$ in GdScO$_{3}$. The obtained Hamiltonian parameters can be used to calculate crystal field energy levels and wave functions of Yb:GdScO$_{3}$ to analyze the mechanism of the luminescence or laser.
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Received: 17 June 2024
Revised: 22 August 2024
Accepted manuscript online: 23 August 2024
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PACS:
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76.30.Kg
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(Rare-earth ions and impurities)
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75.10.Dg
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(Crystal-field theory and spin Hamiltonians)
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78.55.-m
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(Photoluminescence, properties and materials)
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42.55.Tv
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(Photonic crystal lasers and coherent effects)
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| Fund: This work was supported by the National Key Research and Development Program of China (Grant Nos. 2022YFB3605700 and 2023YFB3507403), the National Natural Science Foundation of China (Grant No. 52272011), the Youth Innovation Promotion Association of CAS (Grant No. 2023463), Plan for Anhui Major Provincial Science & Technology Project (Grant No. 202203a05020002), and Open Project of Advanced Laser Technology Laboratory of Anhui Province (Grant No. AHL20220ZR04). |
Corresponding Authors:
Qing-Li Zhang, Gui-Hua Sun
E-mail: zql@aiofm.ac.cn;ghsun@aiofm.ac.cn
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Cite this article:
Jia-Hong Li(李加红), Qing-Li Zhang(张庆礼), Gui-Hua Sun(孙贵花), Jin-Yun Gao(高进云), Ren-Qin Dou(窦仁勤), Xiao-Fei Wang(王小飞), and Shou-Jun Ding(丁守军) Crystal growth, structure and crystal field splitting and fitting of Yb:GdScO3 2024 Chin. Phys. B 33 117601
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