简介概要

Remarkable red-shift of upconversion luminescence and anti-ferromagnetic coupling in NaLuF4:Yb3+/Tm3+/Gd3+/Sm3+ bifunctional microcrystals

来源期刊:Journal of Rare Earths2016年第2期

论文作者:胡仕刚 刘云新 吴笑峰 唐志军 李志明 颜焕元 陈增辉 胡盼 余意

文章页码:166 - 173

摘    要:Lanthanide doped bifunctional materials are potentially important for developing multifunctional devices. Here, NaLuF4:Yb3+/Tm3+/Gd3+/Sm3+ optical-magnetic bifunctional microcrystals were successfully synthesized by hydrothermal method, which could emit 480 nm blue light from the 1G43H6 electronic transition and 800 nm infrared light from the 3H43H6 electronic transition of Tm3+ ion, under the excitation of 980 nm infrared light. By doping Sm3+ ion into Na Lu F4:Yb3+/Tm3+/Gd3+, the infrared emission peak centered at 800 nm would shift obviously to longer wavelength. This indicated that Sm3+ ion could efficiently tune the energy level gaps of Tm3+ ions in Na Lu F4 host which was demonstrated based on the crystal field theory. In addition, these NaLuF4:Yb3+/Tm3+/Gd3+/Sm3+ microcrystals presented unique ferromagnetic property instead of usually reported paramagnetic property. Importantly, the ferromagnetic property decreased with increasing the concentration of Gd3+ ion. This was in good agreement with Swift’s theoretical investigation that the coexistence of light rare earth(Gd3+) and heavy rare earth(Yb3+/Tm3+) would lead to the anti-ferromagnetic coupling in the sub-lattices.

详情信息展示

Remarkable red-shift of upconversion luminescence and anti-ferromagnetic coupling in NaLuF4:Yb3+/Tm3+/Gd3+/Sm3+ bifunctional microcrystals

胡仕刚1,刘云新2,吴笑峰1,唐志军1,李志明3,颜焕元4,陈增辉2,胡盼1,余意1

1. School of Information and Electrical Engineering, Hunan University of Science and Technology2. Department of Physics and Electronic Science, Hunan University of Science and Technology3. School of Information Science and Engineering, University of Jinan4. College of Mechanical and Electrical Engineering, Hunan University of Science and Technology

摘 要:Lanthanide doped bifunctional materials are potentially important for developing multifunctional devices. Here, NaLuF4:Yb3+/Tm3+/Gd3+/Sm3+ optical-magnetic bifunctional microcrystals were successfully synthesized by hydrothermal method, which could emit 480 nm blue light from the 1G43H6 electronic transition and 800 nm infrared light from the 3H43H6 electronic transition of Tm3+ ion, under the excitation of 980 nm infrared light. By doping Sm3+ ion into Na Lu F4:Yb3+/Tm3+/Gd3+, the infrared emission peak centered at 800 nm would shift obviously to longer wavelength. This indicated that Sm3+ ion could efficiently tune the energy level gaps of Tm3+ ions in Na Lu F4 host which was demonstrated based on the crystal field theory. In addition, these NaLuF4:Yb3+/Tm3+/Gd3+/Sm3+ microcrystals presented unique ferromagnetic property instead of usually reported paramagnetic property. Importantly, the ferromagnetic property decreased with increasing the concentration of Gd3+ ion. This was in good agreement with Swift’s theoretical investigation that the coexistence of light rare earth(Gd3+) and heavy rare earth(Yb3+/Tm3+) would lead to the anti-ferromagnetic coupling in the sub-lattices.

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