Spectroscopy and Optical Properties of Sm<sup>3+</sup>:YAG Nanocrystalline Powder Prepared by Co-Precipitation Method: Effect of Sm<sup>3+</sup>Ions Concentrations
Spectroscopy and Optical Properties of Sm<sup>3+</sup>:YAG Nanocrystalline Powder Prepared by Co-Precipitation Method: Effect of Sm<sup>3+</sup>Ions Concentrations作者机构：Department of Laser Sciences and Interactions National Institute of Laser Enhanced Sciences University of Cairo Giza Egypt
出 版 物：《Open Journal of Applied Sciences》 (应用科学（英文）)
年 卷 期：2014年第4卷第3期
页 面：96-102页
主 题：Sm3+ YAG Nanopowders Concentration Dependence Optical Properties Ceramics
摘 要：Samarium doped Yttrium aluminum garnet (YAG) nanopowders with different concentration (0.5%, 1%, 2%, 3%, 5% and 8% mol) were prepared by simple and low cost co-precipitation method. We found that the precursor begins converting to pure YAG at relatively low temperature around 900°C, and no intermediate phases were detected. The powders annealed at 900°C and 1000°C in air with average particle size around ≈30 nm were characterized by means of X-ray diffraction (XRD) analysis and infrared (IR) spectroscopy. The photoluminescent measurements showed that the reddish-orange (RO) emission transition 4G5/2:6H7/2 is more prominent. In addition, the optimum concentration of doped Sm ions that lead to maximum intensity was reported. Also, fluorescence efficiencies as pumping power dependence for different Sm3+ ions concentrations were explored.
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