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学者姓名：陈新
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Abstract ：
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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Abstract ：
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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Abstract ：
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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Ce9.33(SiO4)6O2 (CSO) crystals were grown by the Czochralski (Cz) method. Rietveld refinement of XRD patterns confirmed the oxyapatite structure of CSO, XPS analysis revealed the valence of Ce ions in CSO crystals. Magnetization curve and temperature dependencies of the magnetic susceptibility were measured, paramagnetic behavior and magnetic anisotropy have been observed. Photoluminescence and Faraday rotation characteristics of the CSO crystal were investigated at room temperature. Verdet constants of CSO were about 1.6 times as large as those of TGG. Baesd on Van Vleck-Hebb theory, the effective transition wavelength and probability of CSO crystal were calculated and compared with other Ce3+-containing crystals. The absorption and magnetic circular dichroism (MCD) spectra of 4f -> 5d transitions in Ce3+ ions in CSO crystal were studied.
Keyword ：
Czochralski method Czochralski method Magnetic circular dichroism(MCD) Magnetic circular dichroism(MCD) Magneto -optical properties Magneto -optical properties Verdet constants Verdet constants
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| GB/T 7714 | Chen, Xin , Lan, Qingying , Zhao, Bin et al. Czochralski growth, optical and magneto-optical properties of Ce9.33(SiO4)6O2 crystal [J]. | OPTICAL MATERIALS , 2023 , 147 . |
| MLA | Chen, Xin et al. "Czochralski growth, optical and magneto-optical properties of Ce9.33(SiO4)6O2 crystal" . | OPTICAL MATERIALS 147 (2023) . |
| APA | Chen, Xin , Lan, Qingying , Zhao, Bin , Chen, Jianzhong , Guo, Feiyun . Czochralski growth, optical and magneto-optical properties of Ce9.33(SiO4)6O2 crystal . | OPTICAL MATERIALS , 2023 , 147 . |
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It is now widely recognised that aerosol transport is major vector for transmission of diseases such as COVID-19, and quantification of aerosol transport in the built environment is critical to risk analysis and management. Understanding the effects of door motion and human movement on the dispersion of virus-laden aerosols under pressure-equilibrium conditions is of great significance to the evaluation of infection risks and development of mitigation strategies. This study uses novel numerical simulation techniques to quantify the impact of these motions upon aerosol transport and provides valuable insights into the wake dynamics of swinging doors and human movement. The results show that the wake flow of an opening swinging door delays aerosol escape, while that of a person walking out entrains aerosol out of the room. Aerosol escape caused by door motion mainly happens during the closing sequence which pushes the aerosols out. Parametric studies show that while an increased door swinging speed or human movement speed can enhance air exchange across the doorway, the cumulative aerosol exchange across the doorway is not clearly affected by the speeds.
Keyword ：
Aerosol exchange Aerosol exchange Human movement Human movement Indoor environment Indoor environment Pressure equilibrium Pressure equilibrium Swinging door Swinging door
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| GB/T 7714 | Zheng, Minfeng , Fan, Yaming , Li, Xiangdong et al. Aerosol exchange between pressure-equilibrium rooms induced by door motion and human movement [J]. | BUILDING AND ENVIRONMENT , 2023 , 241 . |
| MLA | Zheng, Minfeng et al. "Aerosol exchange between pressure-equilibrium rooms induced by door motion and human movement" . | BUILDING AND ENVIRONMENT 241 (2023) . |
| APA | Zheng, Minfeng , Fan, Yaming , Li, Xiangdong , Lester, Daniel , Chen, Xin , Li, Yiyu et al. Aerosol exchange between pressure-equilibrium rooms induced by door motion and human movement . | BUILDING AND ENVIRONMENT , 2023 , 241 . |
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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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Two-dimensional (2D) Sn-based perovskites have emerged as a promising alternative to Pb-based perovskites due to their nontoxic nature. However, Sn2+ ions tend to get oxidized to Sn4+ during the synthesis process, leading to crystalline defects and rapid nonradiative transitions, which limits their applications. In this study, we present a facile molecular doping strategy for (C18H35NH3)(2)SnBr4 perovskite by introducing o-phenylenediamine (oPD) in the precursor solution. The oPD serves a dual role: it not only acts as an electron donor, creating a reducing environment to suppress the oxidation of Sn2+, but also functions as a chelating agent, forming stable compounds with Sn2+. This approach results in 20% oPD doped (C18H35NH3)(2)SnBr4 perovskite, which exhibits a high photoluminescence quantum yield (PLQY) of 95.3% and excellent stability against oxygen. Furthermore, UV-pumped orange and white light-emitting diodes (LEDs) with a CIE coordinate (0.562, 0.431, 0.327, and 0.346) were produced using oPD-doped 2D tin-based perovskite powders, respectively. These findings suggest that the doping strategy has great potential to enhance the stability of 2D Sn-based perovskites and facilitate their application in the field of lighting devices.
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| GB/T 7714 | Zhang, Yongqi , Cheng, Hongrui , Chen, Xin et al. o-Phenylenediamine Doped Tin-Based Two-Dimensional Perovskite for Light-Emitting Device Applications [J]. | JOURNAL OF PHYSICAL CHEMISTRY C , 2023 , 127 (49) : 23827-23834 . |
| MLA | Zhang, Yongqi et al. "o-Phenylenediamine Doped Tin-Based Two-Dimensional Perovskite for Light-Emitting Device Applications" . | JOURNAL OF PHYSICAL CHEMISTRY C 127 . 49 (2023) : 23827-23834 . |
| APA | Zhang, Yongqi , Cheng, Hongrui , Chen, Xin , Zheng, Yuanhui . o-Phenylenediamine Doped Tin-Based Two-Dimensional Perovskite for Light-Emitting Device Applications . | JOURNAL OF PHYSICAL CHEMISTRY C , 2023 , 127 (49) , 23827-23834 . |
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Carbon nitride (CN) has attracted intensive attention as a visible light photocatalyst, but the rapid recombination of photogenerated charge carriers limits its photocatalytic activity. Herein, we develop a new strategy to construct both homojunction and ohmic junction into CN via selectively introducing metallized CN (MCN), which leads to rapid separation and transfer of photogenerated charge carriers. The polymerization of urea in the presence of KOH creates CN homojunction with amino and cyano groups. The subsequent molten salt treatment induces a new type of cyano-terminated CN that can be converted to MCN through photodoping, forming homojunction and ohmic contact coexisting CN (HOCN). The formed HOCN photocatalyst exhibits a high photocatalytic H-2 evolution rate of 18.5 mmol.g(-1).h(-1) under visible light irradiation, 45-fold higher than that of bulk CN. This strategy provides a new idea for designing ohmic contact between semiconductor and metal, and realizing efficient photocatalysis by improving charge separation and transfer.
Keyword ：
carbon nitride carbon nitride homojunction homojunction hydrogen evolution hydrogen evolution ohmic contact ohmic contact photocatalysis photocatalysis
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| GB/T 7714 | Fang, Xiao , Chen, Lu , Cheng, Hongrui et al. Homojunction and ohmic contact coexisting carbon nitride for efficient photocatalytic hydrogen evolution [J]. | NANO RESEARCH , 2023 , 16 (7) : 8782-8792 . |
| MLA | Fang, Xiao et al. "Homojunction and ohmic contact coexisting carbon nitride for efficient photocatalytic hydrogen evolution" . | NANO RESEARCH 16 . 7 (2023) : 8782-8792 . |
| APA | Fang, Xiao , Chen, Lu , Cheng, Hongrui , Bian, Xiaoqiong , Sun, Wenhao , Ding, Kaining et al. Homojunction and ohmic contact coexisting carbon nitride for efficient photocatalytic hydrogen evolution . | NANO RESEARCH , 2023 , 16 (7) , 8782-8792 . |
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