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学者姓名：胡晓琳
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Abstract ：
采用熔盐法，以Bi_2O_3为自助溶剂，成功制备了Sr/Ti∶BiFeO_3系列晶体。X射线衍射谱和Rietveld精修结果显示，Sr~(2+)、Ti~(4+)离子掺杂使BiFeO_3的结构从三方相转变为无双折射的立方相。这一结构转变也通过扫描电子显微镜的观察得到了证实。Sr/Ti∶BiFeO_3的X射线光电子能谱表明，随着Sr~(2+)、Ti~(4+)的引入，BiFeO_3的Fe元素价态发生改变。高价Fe离子的生成使BiFeO_3产生晶格畸变，并对其周期性螺旋自旋磁结构产生抑制作用，从而使BiFeO_3的宏观磁性得到提高，但矫顽力没有发生明显变化。晶体磁滞回线和磁圆二色效应光谱显示，Bi_(0.7)Sr_(0.3)Fe_(0.7)Ti_(0.3)O_3的饱和磁化强度较BiFeO_3提高了3倍，其磁光效应达到商用Y_3Fe_5O_(12)的4.5倍。
Keyword ：
BiFeO_3 BiFeO_3 材料 材料 熔盐法 熔盐法 磁光晶体 磁光晶体 磁圆二色性 磁圆二色性 磁性 磁性
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| GB/T 7714 | 林楠茜 , 杨新攀 , 许晨浚 et al. 立方相BiFeO_3磁光晶体的熔盐法制备与性能分析 [J]. | 光学学报 , 2024 , 44 (14) : 189-198 . |
| MLA | 林楠茜 et al. "立方相BiFeO_3磁光晶体的熔盐法制备与性能分析" . | 光学学报 44 . 14 (2024) : 189-198 . |
| APA | 林楠茜 , 杨新攀 , 许晨浚 , 吴华钦 , 张宏 , 庄乃锋 et al. 立方相BiFeO_3磁光晶体的熔盐法制备与性能分析 . | 光学学报 , 2024 , 44 (14) , 189-198 . |
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Abstract ：
运用高温固相法合成系列掺铕(Eu)的氮化物荧光粉Ca_(1-)_xAlSiN_3∶xEu~(2+),对所得到的最佳样品Ca_(0.99)AlSiN_3∶0.01Eu~(2+)进行系列表征和结构精修.结果表明，样品Ca_(0.99)AlSiN_3∶0.01Eu~(2+)的晶粒尺寸为10μm左右，各元素分布均匀，其精修图与实测XRD谱图基本吻合，属于正交晶系结构.该样品的色坐标为(0.645 1, 0.354 5),落在红光区域，色纯度高达100%,相关色温为2 449 K,属于低色温.该荧光粉在298～473 K范围内表现出良好的热稳定性，活化能为0.26 eV,具有广阔的市场前景.
Keyword ：
Rietveld精修 Rietveld精修 发光性能 发光性能 热稳定性 热稳定性 红色荧光粉 红色荧光粉 铕掺杂 铕掺杂
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| GB/T 7714 | 林莹 , 刘梦丽 , 冯嘉雯 et al. 红色荧光粉CaAlSiN_3∶Eu~(2+)的结构精修和性能 [J]. | 福州大学学报(自然科学版) , 2024 , 52 (02) : 207-212 . |
| MLA | 林莹 et al. "红色荧光粉CaAlSiN_3∶Eu~(2+)的结构精修和性能" . | 福州大学学报(自然科学版) 52 . 02 (2024) : 207-212 . |
| APA | 林莹 , 刘梦丽 , 冯嘉雯 , 郑文旭 , 胡晓琳 , 庄乃锋 . 红色荧光粉CaAlSiN_3∶Eu~(2+)的结构精修和性能 . | 福州大学学报(自然科学版) , 2024 , 52 (02) , 207-212 . |
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Cubic Sillenite Bi25FeO40 (BFO) could become a new magneto-optical material due to its high concentration of Bi3+ and no birefringence. But its weak magnetism causes the magneto-optical properties to be far from the requirements of practical applications. Doping magnetic Fe3+ and Ni2+ ions to improve the magnetism and magneto-optical properties of BFO (Bi19Ni2.8Fe4.2O40) film on fluorine-doped tin oxide (BNFO/FTO) is discussed in this paper. Another focus of this paper is to discuss the magneto-optical properties modulated by the electric field. The cubic BNFO film has weak piezoelectric effects, which makes it difficult to modulate its magnetooptical effect by electric field. A polarity symmetry induced by the Schottky junction between Au metal layer and BNFO semiconductor layer (Au/BNFO) compensates for cubic symmetry, and the piezoelectric effect can be improved. By applying an electric field, its magnetic circular dichroism (MCD) ellipticity |Psi F| gradually decreases as a direct current voltage from 0 V to 10 V in a magnetic field of 2500 Oe, demonstrating the feasibility of this strategy. These results indicate a new way for highly symmetric magneto-optical materials to modulate magneto-optical effects in electric fields.
Keyword ：
Au/BNFO/FTO film Au/BNFO/FTO film Magneto -electric coupling Magneto -electric coupling Magneto -optical effect Magneto -optical effect Piezoelectric effect Piezoelectric effect
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| GB/T 7714 | Gao, Teng , Wu, Junying , Liang, Jinlun et al. Interface polarity brings a way to modulate magneto-optical effect of cubic Ni2+/Fe3+co-doped Bi25FeO40 film: Implications in piezoelectricity [J]. | APPLIED SURFACE SCIENCE , 2024 , 659 . |
| MLA | Gao, Teng et al. "Interface polarity brings a way to modulate magneto-optical effect of cubic Ni2+/Fe3+co-doped Bi25FeO40 film: Implications in piezoelectricity" . | APPLIED SURFACE SCIENCE 659 (2024) . |
| APA | Gao, Teng , Wu, Junying , Liang, Jinlun , Wang, Cheng , Liu, Mengli , Yang, Yanduan et al. Interface polarity brings a way to modulate magneto-optical effect of cubic Ni2+/Fe3+co-doped Bi25FeO40 film: Implications in piezoelectricity . | APPLIED SURFACE SCIENCE , 2024 , 659 . |
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Bi-doped rare earth iron garnet (Bi:RIG) crystal is an ideal magneto-optical material for optical isolators in the near-infrared band, which has been widely used in optical communication applications. In this paper, centimetersized and good-quality Ni2+-doped Bi:RIG crystals were successfully grown by top-seeded solution growth (TSSG). The transmittance reaches 72.6% at 1550 nm, which is higher than commercial Bi:TbIG crystal and close to the theoretical values of RIG crystals. Doping Ni can not only greatly improve the transmittance, magnetic, and magneto-optical properties, but also decrease the Faraday rotation temperature (FTC) and wavelength coefficients (FWC) of the Bi:RIG crystal. The FTC and FWC of (Bi0.37Ho1.18Eu0.83Gd0.62)(Fe4.20Ni0.25Ga0.55)O-12 crystal reduced to - 6.3 x 10(-4) K-1 and 8.0 x 10(-4) nm(-1), which are about 30% and 80% of commercial Bi:TbIG crystal, respectively. (Bi0.37Ho1.18Eu0.83Gd0.62)(Fe4.20Ni0.25Ga0.55)O-12 exhibits potential for utilization in new high -performance, wideband magneto-optical isolators, and is expected to find application in the field of wavelength division multiplexing fiber communication.
Keyword ：
Crystal growth Crystal growth Magneto-optical material Magneto-optical material Ni/Bi co-doping Ni/Bi co-doping Rare earth iron garnet Rare earth iron garnet Top seeded solution growth Top seeded solution growth
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| GB/T 7714 | Yang, Yanduan , Fan, Xiaoyu , Liu, Haipeng et al. A new Ni/Bi Co-doping rare earth iron garnet crystal with high transmittance, low temperature and wavelength coefficients [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 978 . |
| MLA | Yang, Yanduan et al. "A new Ni/Bi Co-doping rare earth iron garnet crystal with high transmittance, low temperature and wavelength coefficients" . | JOURNAL OF ALLOYS AND COMPOUNDS 978 (2024) . |
| APA | Yang, Yanduan , Fan, Xiaoyu , Liu, Haipeng , Wu, Junying , Yang, Yang , Chen, Xin et al. A new Ni/Bi Co-doping rare earth iron garnet crystal with high transmittance, low temperature and wavelength coefficients . | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 978 . |
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The chiral sillenite Bi25FeO40 exhibits versatile properties including electro-optics, magneto-optics, optical rotation, and photorefraction, showing great potential in multi-functional magneto-optical devices. However, the weak magnetism of this crystal leads to a poor magneto-optical property, which is extremely hindering its practical applications. Combining with the sillenite structure, the formation energy and the magnetic-optical effect are calculated based on density functional theory. The codoping of strongly magnetic Co and Fe ions is predicted to enable high doping concentrations. The hybridization between Bi 6p orbitals and Fe/Co 3d orbitals significantly enhances the optical transition and thus greatly improves the magneto-optical properties. The millimeter-sized Bi26-x-yCoxFeyO40 crystals are successfully prepared by hydrothermal methods. The characterizations on structure, TG-DSC, magnetism, and magneto-optical effect confirm the theoretical predictions that the Co-Fe codoped crystals maintain the chiral bismuth ferrite structure with multifunctional properties and high thermal stability. The Co-Fe codoping significantly enhances the magnetism and magneto-optical properties of Bi25FeO40 crystal. The magnetization of Bi19.0Co3.5Fe3.5O40 increases by 27 times and the magneto-optical effect of Bi19.8Co3.0Fe3.2O40 at 720, 777, 1288, 1388, and 1790 nm are greater than Bi:YIG and undoped Bi25FeO40. Bi26-x-yCoxFeyO40 crystals with enhanced magneto-optical properties by Co-Fe codoping are promising for novel multifunctional magneto-optical devices. DFT calculation is a feasible way for predicting the magneto-optical Faraday rotation angle of Bi25FeO40 sillenite crystal. A series of cubic Bi26-x-yCoxFeyO40 crystals are prepared by hydrothermal method. Bi19.8Co3.0Fe3.2O40 crystal has a stronger magneto-optical effect than the commercial Bi:YIG crystal in 1500-1800 nm. It opens up new possibility for the creation of novel multiple functions magneto-optical devices. image
Keyword ：
density functional theory calculation density functional theory calculation magnetism magnetism magneto-optical effect magneto-optical effect rietveld refinement rietveld refinement sillenite crystals sillenite crystals
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| GB/T 7714 | Liu, Meng-Li , Wang, Cheng , Wu, Xuan et al. Greatly Enhanced Magnetic and Magneto-Optical Properties of Bismuth Iron Oxide Sillenite Crystal with Cobalt-Iron Codoping [J]. | ADVANCED OPTICAL MATERIALS , 2024 , 12 (10) . |
| MLA | Liu, Meng-Li et al. "Greatly Enhanced Magnetic and Magneto-Optical Properties of Bismuth Iron Oxide Sillenite Crystal with Cobalt-Iron Codoping" . | ADVANCED OPTICAL MATERIALS 12 . 10 (2024) . |
| APA | Liu, Meng-Li , Wang, Cheng , Wu, Xuan , Shen, Jin-Ru , Gao, Teng , Chen, Xin et al. Greatly Enhanced Magnetic and Magneto-Optical Properties of Bismuth Iron Oxide Sillenite Crystal with Cobalt-Iron Codoping . | ADVANCED OPTICAL MATERIALS , 2024 , 12 (10) . |
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Rhombohedral La:BiFeO3 films were successfully prepared on Si substrates by using Radio frequency magnetron sputtering method. The LaNiO3 as buffer layer is beneficial for improving the quality of the film, reducing surface roughness, and getting rid of the impure phase. The Bi0.9La0.1FeO3/LaNiO3/Si film has the largest piezoelectric coefficient with d(33) reaching 4.76 pm/V, which is about 2.5 times larger than that of BiFeO3/LaNiO3/Si. The saturation magnetization and the MCD signal of BiFeO3 films are significantly enhanced by doping La3+. The MCD ellipticity of La:BiFeO3 film at 555 nm increase with the increase of La3+ concentration. Bi0.7La0.3FeO3/ LaNiO3/Si film show strong magneto-optical effect with the high MCD ellipticity of 850 deg./cm, which is more than about 1.7 times larger than that of BiFeO3 film. This film is expected to be developed into a new multifunctional material with multi-field coupling of electro-opt-magnetism.
Keyword ：
La:BiFeO3 La:BiFeO3 Magneto-optical effect Magneto-optical effect Piezoelectric Piezoelectric Si Substrate Si Substrate
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| GB/T 7714 | Cao, Qinyu , Zhao, Ying , Ye, Renjie et al. Piezoelectric and magneto-optical effect of lanthanum-doped bismuth ferrite films on silicon substrate [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 967 . |
| MLA | Cao, Qinyu et al. "Piezoelectric and magneto-optical effect of lanthanum-doped bismuth ferrite films on silicon substrate" . | JOURNAL OF ALLOYS AND COMPOUNDS 967 (2023) . |
| APA | Cao, Qinyu , Zhao, Ying , Ye, Renjie , Chen, Xin , Hu, Xiaolin , Zhuang, Naifeng . Piezoelectric and magneto-optical effect of lanthanum-doped bismuth ferrite films on silicon substrate . | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 967 . |
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Bi3+-doped iron garnet crystals (Bi:RIG) have received extensive attention for their excellent magneto-optical properties. The quality of garnet crystals has a great relationship with mismatch in the lattice and thermal expansion between crystals and seeds. Compared with TGG seeds, Sc,Ga:YIG is more suitable as the seed for growing Bi:(HoEu)IG crystals. The crystal quality and match in the lattice and thermal expansion have been discussed. The as-grown Bi:(HoEu)IG crystal has a specific Faraday rotation angle of -467 degrees cm-1 and shows a strong magneto-optical effect.
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| GB/T 7714 | Yang, Yanduan , Tu, Jinliang , Zhan, Guangxing et al. Growth Considering Lattice Mismatch and Thermal Expansion and Magneto-Optical Properties of Bismuth-Doped Rare Earth Iron Garnet Crystals [J]. | CRYSTAL GROWTH & DESIGN , 2023 . |
| MLA | Yang, Yanduan et al. "Growth Considering Lattice Mismatch and Thermal Expansion and Magneto-Optical Properties of Bismuth-Doped Rare Earth Iron Garnet Crystals" . | CRYSTAL GROWTH & DESIGN (2023) . |
| APA | Yang, Yanduan , Tu, Jinliang , Zhan, Guangxing , Liu, Haipeng , Fan, Xiaoyu , Chen, Xin et al. Growth Considering Lattice Mismatch and Thermal Expansion and Magneto-Optical Properties of Bismuth-Doped Rare Earth Iron Garnet Crystals . | CRYSTAL GROWTH & DESIGN , 2023 . |
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The magneto-optical effects of rare earth ferrite can be greatly improved by doping Ce3+ ions. CeFeO3 with high Ce3+ concentration has excellent magneto-optical properties in theory. And due to its perovskite structure it is more suitable to be deposited on the substrates of optical devices compared with the commercial garnet ferrite. In this paper, the pure phase CexFe2-xO3 films were successfully obtained on the quartz glass and <100>-oriented SrTiO3 crystal substrates by radio frequency magnetron sputtering. The effects of substrate and Ce:Fe ratio on the epitaxial orientation, magnetism and magneto-optical performance of films were systematically studied. For the Ce1.0Fe1.0O3/STO film, its MCD ellipticity (psi(F)) intensity can reach up to 4750(degrees)/cm in the visible band and 14090(degrees)/cm in near ultraviolet band. And it also shows a strong vertical magnetic anisotropy, which makes it maintain a good thermal stability when the device size is reduced. These mean that the Ce1.0Fe1.0O3/STO film has a promising application in integrated optical communication devices.
Keyword ：
Cerium Cerium Magnetic anisotropy Magnetic anisotropy Magnetic circular dichroism Magnetic circular dichroism Magneto -optical effect Magneto -optical effect Rare earths Rare earths Thin film Thin film
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| GB/T 7714 | Lin, Nanxi , Sheng, Fangliang , Chen, Xin et al. Epitaxy growth of pure phase CeFeO3 thin films with high magneto- optical performance and strong vertical magnetic anisotropy [J]. | JOURNAL OF RARE EARTHS , 2023 , 41 (12) : 2018-2024 . |
| MLA | Lin, Nanxi et al. "Epitaxy growth of pure phase CeFeO3 thin films with high magneto- optical performance and strong vertical magnetic anisotropy" . | JOURNAL OF RARE EARTHS 41 . 12 (2023) : 2018-2024 . |
| APA | Lin, Nanxi , Sheng, Fangliang , Chen, Xin , Hu, Xiaolin , Zhuang, Naifeng . Epitaxy growth of pure phase CeFeO3 thin films with high magneto- optical performance and strong vertical magnetic anisotropy . | JOURNAL OF RARE EARTHS , 2023 , 41 (12) , 2018-2024 . |
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A novel Praseodymium-doped borate (Pr:alpha-BBO) laser crystal was grown successfully by using the Czochralski method. The phase structure, absorption and fluorescence lifetime, as well as blue laser diode (LD) pump performances of Pr:alpha-BBO were totally studied. The segregation coefficient and valence state of Pr ions in the crystals were investigated using inductively coupled plasma atomic emission spectroscopy and X-ray photo-electron spectroscopy. A 450 nm blue LD was employed to carry out a pump experiment on the Pr:alpha-BBO slab crystal with a doping concentration of 0.22 at.%. The main emission peaks of Pr3+ ions in the orange-red light band were found to be at 611.5 nm, 634.7 nm, and 638.3 nm. The experimental results show that the Pr:alpha-BBO crystal exhibits higher orange light fluorescence emission performance, with an emission peak intensity at 611 nm that is 2.1 times stronger than that at 635 nm due to the splitting of the 3P0 -> 3F2 transition (635 nm). By optimizing the Pr:alpha-BBO laser crystal growth process and further solid-state laser experiments, it can be expected to have broad applications in laser medicine, spectral detection, and nonlinear optical frequency conversion fields.
Keyword ：
Czochralski method Czochralski method Praseodymium-doped borate Praseodymium-doped borate Pr doped crystal Pr doped crystal Visible laser Visible laser
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| GB/T 7714 | Chen, Xin , Lu, Shuying , Sun, Wenhan et al. Growth and spectral properties of a novel praseodymium-doped alpha-barium borate laser crystal [J]. | OPTICAL MATERIALS , 2023 , 145 . |
| MLA | Chen, Xin et al. "Growth and spectral properties of a novel praseodymium-doped alpha-barium borate laser crystal" . | OPTICAL MATERIALS 145 (2023) . |
| APA | Chen, Xin , Lu, Shuying , Sun, Wenhan , Guo, Zhengwei , Liao, Honglin , Lin, Chunyan et al. Growth and spectral properties of a novel praseodymium-doped alpha-barium borate laser crystal . | OPTICAL MATERIALS , 2023 , 145 . |
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This paper focuses on the magneto-optical properties of sillenite Bi25FeO40 crystals rather than optofractive, optoelectronic, piezoelectric and other properties. The Bi25FeO40 crystals with heavy Co3+ and Fe3+ co -doping were successfully grown into centimeter size by the top-seeded solution growth method. The thermal stability of crystal structure was improved. Annealing in oxygen atmosphere can greatly reduce oxygen vacancy defects, thereby improving the transmittance of the crystal. After doping Co3+ and Fe3+, Fe -O-Fe, Fe-O-Co and Co-O-Co superexchange interactionis formed in the crystal, which greatly enhances the magnetism of the crystal. Not only the magnetic but also the magneto-optical properties were significantly enhanced by co-doping Co3+ and Fe3+.(c) 2023 Published by Elsevier B.V.
Keyword ：
Co3+ Co3+ Fe3+co-doped Fe3+co-doped Magneto-optical crystal Magneto-optical crystal MCD ellipticity MCD ellipticity Sillenite Sillenite Top-seeded solution growth method Top-seeded solution growth method
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| GB/T 7714 | Gao, Teng , Li, Xinying , Wu, Gonghui et al. Growth and magneto-optical properties of Bi25FeO40 crystals with heavy Co/Fe co-doping [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 947 . |
| MLA | Gao, Teng et al. "Growth and magneto-optical properties of Bi25FeO40 crystals with heavy Co/Fe co-doping" . | JOURNAL OF ALLOYS AND COMPOUNDS 947 (2023) . |
| APA | Gao, Teng , Li, Xinying , Wu, Gonghui , Wang, Cheng , Wu, Xuan , Hu, Xiaolin et al. Growth and magneto-optical properties of Bi25FeO40 crystals with heavy Co/Fe co-doping . | JOURNAL OF ALLOYS AND COMPOUNDS , 2023 , 947 . |
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