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Optical phonon behavior and magnetism of columbite Zn0.8Co0.2Nb2O6
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作者 Liang Li Xiaohan Wang +3 位作者 Ying Liu Fangfei Li Qiang Zhou Tian Cui 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第12期56-59,共4页
Columbite Zn0.8Co0.2Nb2O6 crystals were grown by optical floating zone methods. The x-ray diffraction(XRD) was used to check the structure information of the grown Zn0.8Co0.2Nb2O6 crystal. The room temperature and tem... Columbite Zn0.8Co0.2Nb2O6 crystals were grown by optical floating zone methods. The x-ray diffraction(XRD) was used to check the structure information of the grown Zn0.8Co0.2Nb2O6 crystal. The room temperature and temperature-dependent Raman spectra were tested to investigate the optical phonon behaviors of columbite Zn0.8Co0.2Nb2O6, which exhibited a temperature stable property. The magnetics properties of Zn0.8Co0.2Nb2O6, measured by a physical property measurement system(PPMS), were also presented in this work. 展开更多
关键词 columbite Zn0.8Co0.2Nb2O6 optical floating zone methods Raman spectra magnetics properties
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Crystal growth,structure and optical properties of Pr^(3+)-doped yttria-stabilized zirconia single crystals 被引量:1
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作者 Dai-Ni Wang Shou-Lei Xu +4 位作者 Xiang-Yu Wang Si-Yao Li Xing Hong Bernard A.Goodman Wen Deng 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第7期583-590,共8页
The development of blue semiconductor light-emitting diodes(LEDs)has produced potential applications for Prdoped materials that can absorb blue light,especially crystals,and we now report structure and optical propert... The development of blue semiconductor light-emitting diodes(LEDs)has produced potential applications for Prdoped materials that can absorb blue light,especially crystals,and we now report structure and optical properties for high-quality Pr-doped single crystals of yttria-stabilized zirconia(YSZ)grown by the optical floating zone(FZ)method.X-ray diffraction(XRD)and Raman spectroscopy showed that all of the single crystal samples were in the cubic phase,whereas the corresponding ceramic samples contained a mixture of monoclinic and cubic phases.X-ray photoelectron spectroscopy(XPS)and electron paramagnetic resonance(EPR)spectroscopy showed that Pr was present as the Pr^(3+)ion in ceramic rods and single crystals after heating to high temperatures.The absorption and photoluminescence excitation(PLE)spectra of the Pr-doped YSZ crystals measured at room temperature showed strong absorption of blue light,while their photoluminescence(PL)spectra showed five emission peaks at 565 nm,588 nm,614 nm,638 nm,and 716 nm under450 nm excitation.The optimum luminescence properties were obtained with the crystal prepared using 0.15 mol%Pr_(6)O_(11),and those with higher concentrations showed evidence of quenching of the luminescence properties.In addition,the color purity of Pr-doped YSZ single crystal reached 98.9%in the orange–red region. 展开更多
关键词 yttria-stabilized zirconia(YSZ)single crystal praseodymium-doped optical floating zone method luminescence
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White light luminescence in Dy/Tm co-doped yttria stabilized zirconia single crystals 被引量:2
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作者 Xing Hong Lei Zhang +5 位作者 Shoulei Xu Zeyu Cheng Yazhao Wang Bernard A.Goodman Dingkang Xiong Wen Deng 《Journal of Rare Earths》 SCIE EI CAS CSCD 2023年第12期1904-1910,I0003,共8页
A series of high quality Dy_(2)O_(3) and Tm_(2)O_(3)co-doped yttria stabilized zirconia(YSZ) single crystals was synthesized.These crystals have a single cubic structure,and exhibit the characteristic of Dy^(3+)(blue ... A series of high quality Dy_(2)O_(3) and Tm_(2)O_(3)co-doped yttria stabilized zirconia(YSZ) single crystals was synthesized.These crystals have a single cubic structure,and exhibit the characteristic of Dy^(3+)(blue and yellow emissions) and Tm^(3+)(blue emission) under excitation with NUV light.Impo rtantly,the hue can be varied between blue and white by modifying the Tm^(3+)/Dy^(3+)ratio.The photoluminescence and decay curves are consistent with the existence of resonance-type energy transfer from Tm^(3+)to Dy^(3+)ions via an electric multipole interaction mechanism.Maximum luminescence intensity is observed in YSZ doped with 0.50 mol% Tm_(2)O_(3) and 0.75 mol% Dy_(2)O_(3),and this sample has CIE coordinates(x = 0.33,y = 0.33) in accordance with those for white chromaticity.Thus,the outstanding luminescence properties of these single crystals suggest potential applications in white light emission devices. 展开更多
关键词 YSZ single crystal Tm^(3+)/Dy^(3+)co-doping optical floating zone method Resonance energy transfer White light emission Rare earths
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