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Tuning spin reorientation in Er1–xYxFeO3 single crystal family

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Frontiers of physics 2019年第1期14卷 105-110页

作者： Ning Yuan Ru-Bin Li You-Shuang Yu Zheng-Jie Feng bao-juan kang Shi-Yi Zhuo Jun-Yi Ge Jin-Cang Zhang Shi-Xun Cao Department of Physics International Center of Quantum and Molecular Structures Shanghai University Shanghai 200444 China Materials Genome Institute Shanghai University Shanghai 200444 China Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China

A temperature-induced spin reorientation transition between Г4 (Gx, Ay, Fz) and Г2 (Fx, Cy, Gz) has been studied in the family of Er1–xYxFeO3 (x = 0, 0.25, 0.5, 0.75, 1) single crystals. By doping nonmagnetic Y3+, we tuned the spin reorientation temperature to low temperature with increasing x. Moreover, the typical compensation point and spin flip transition of ErFeO3 also decreases with doping, and disappears above x = 0.75. We also report the Rietveld refinements and Raman spectroscopy of Er1–xYxFeO3, where some Raman peaks are shifted to low frequency with increasing doping. Our results shed light on the understanding of the interaction between two magnetic sub-lattices of rare earth (R3+) and iron (Fe3+) ions, and will also contribute to the materials design and potential applications.

关键词： Er1–xYxFeO3 single crystal growth magnetic measurements

A low redox potential and long life organic anode material for sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 557-564页

作者： Zhi Li Yang Wei kang Zhou Xin Huang Xing Zhou Jie Xu Taoyi Kong Junwei Lucas bao Xiaoli Dong Yonggang Wang Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fudan University Department of Chemistry Boston College School of Materials Science and Engineering Anhui University of Technology

Sodium-ion batteries （SIBs） with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C,H,O,and sodium ***,organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials（>1 V）.Organic electrodes with low redox potential that can be used as anode are ***,a novel organic anode material （tetrasodium 1,4,5,8-naphthalenetetracarboxylate,Na4TDC） has been developed with low redox potential （<0.7 V） and excellent cyclic *** three-sodium storage mechanism was demonstrated with various in-situ/ex-situ spectroscopy and theoretical calculations,showing a high capacity of 208 mAh/g and an average decay rate of merely 0.022%per ***,the Na4TDC-hard carbon composite can further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg *** pairing with a thick Na3V2（PO4）3cathode (20.6 mg cm-2),the as-fabricated full cell exhibited high operating voltage （2.8 V）,excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles,well highlighting the Na4TDC anode material for SIBs.

关键词： Organic anode material Low redox potential Composite anode Sodium-ion batteries

A surface engineering strategy for the stabilization of zinc metal anodes with montmorillonite layers toward long-life rechargeable aqueous zinc ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 94-105页

作者： Wenbo Wang Ruifeng Xu Xu Zhang Peiyu Wang bao Yang Bingjun Yang juan Yang Kailimai Su Pengjun Ma Yanan Deng Xianfeng Fan Wanjun Chen Key Laboratory for Electronic Materials College of Electrical Engineering Northwest Minzu University Resource Chemistry and Energy Materials Research Center State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Institute for Materials and Processes School of Engineering University of Edinburgh

Rechargeable aqueous zinc-ion batteries （AZIBs） exhibit appreciable potential in the domain of electrochemical energy ***,there are serious challenges for AZIBs,for instance zinc dendrite growth,hydrogen evolution reaction （HER）,and corrosion side ***,we propose a surface engineering modification strategy for coating the montmorillonite （MMT） layer onto the surface of the Zn anode to tackle these issues,thereby achieving high cycling stability for rechargeable *** results reveal that the MMT layer on the surface of the Zn anode is able to provide ordered zincophilic channels for zinc ions migration,facilitating the reaction kinetics of zinc *** functional theory（DFT） calculations and water contact angle （CA） tests prove that MMT@Zn anode exhibits superior adsorption capacity for Zn2+and better hydrophobicity than the bare Zn anode,thereby achieving excellent cycling ***,the MMT@Zn||MMT@Zn symmetric cell holds the stable cycling over 5600 h at 0.5 mA cm-2and 0.125 m A h cm-2,even exceeding 1800 h long cycling under harsh conditions of 5 m A cm-2and 1.25 m A h *** MMT@Zn||V2O5full cell reaches over 3000 cycles at 2 A g-1with excellent rate ***,this surface engineering modification strategy for enhancing the electrochemical performance of AZIBs represents a promising application.

关键词： Surface engineering strategy Montmorillonite layer Protection mechanism of Zn anode Cycling stability Aqueous zinc ion batteries

Gd掺杂ErNi2B2C体系的超导和磁特性研究

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低温物理学报 2008年第4期30卷 279-282页

作者：陈颖曹世勋葛军饴康保娟张金仓上海大学理学院物理系

本文研究了Gd掺杂对Er1-xGdxNi2B2C体系超导和磁转变行为的影响.随着稀土元素Gd逐步替代Er,体系的超导电性被强烈抑制,反铁磁转变温度逐渐升高.本文就Gd掺杂对体系超导和磁性的影响机制进行了讨论,并基于DG因子模型,对实验结果进行了分析.

关键词： Er1-xGdxNi2B2C 超导电性磁特性 DG因子

Serrated plastic flow behavior and microstructure in a Zr-based bulk metallic glass processed by surface mechanical attrition treatment

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Journal of Iron and Steel Research International 2017年第4期24卷 475-482页

作者： juan-juan Liu Qing Wang kang Sun Sebastien Gravier Jean-jacque Blandin bao-an Sun Jian Lu Laboratory for Microstructures Institute of MaterialsShanghai UniversityShanghai 200072China Department of Mechanical and Biomedical Engineering City University of Hong Kong Science et Ingenierie des Matériaux et des Procédés(SIMAP) University of Grenoble/CNRSGrenoble-INPSaint-Martin d'Heres Cedex 38402France

The serrated plastic flow,microstructure and residual stress of a Zr_（55）Cu_（30）Ni_5Al_（10） bulk metallic glass（BMG）undergone surface mechanical attrition treatment（SMAT）have been investigated by a combination of compression tests with scanning electron microscopy（SEM）,high resolution transmission electron microscopy（HRTEM）and the incremental hole-drilling strain-gage *** is found that SMAT leads to various microstructural modifications and residual stress distribution in the surface layers of the Zrbased BMG due to the mechanically-induced nanocrystallization and generation of shear *** a result,the BMG alloy exhibits a remarkable work-hardening like behavior and significant increase of plastic strain from less than 1%to 15%,and its plastic deformation dynamics yields a power-law distribution of shear *** upon the analysis of the experimental results,it is indicated that this can be connected to the SMAT-induced microstructural modifications and the resulting residual compressive stress in the Zr-based BMG.

关键词： Bulk metallic glass Surface mechanical attrition treatment Serrated flow Microstructure Residual stress

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Finite Atomic Decomposition Characterization of Variable Anisotropic Hardy Spaces

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Acta Mathematica Sinica,English Series 2022年第3期38卷 571-590页

作者： An kang YU Ya juan YANG bao De LI Ai Ting WANG College of Mathematics and System Science Xinjiang UniversityUrumqi830046P.R.China School of Mathematics and Statistics Qinhai Nationalities UniversityXining810007P.R.China

In 2011,Dekel et *** highly geometric Hardy spaces H^(p)(Θ),for the full range 0 详细信息

In 2011,Dekel et *** highly geometric Hardy spaces H^(p)(Θ),for the full range 0

关键词： Anisotropy Hardy space atomic decomposition sublinear operator

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Mechanistic insights into nickel-and goldcatalyzed diastereoselective[4+2+1]cycloadditions between dienynes and diazo compounds:a DFT study

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Organic Chemistry Frontiers 2022年第3期9卷 693-702页

作者： kang Lv Xiaoguang bao Innovation Center for Chemical Sciences College of ChemistryChemical Engineering and Materials ScienceSoochow University199 Ren-Ai RoadSuzhou Industrial ParkSuzhouJiangsu 215123China School of Engineering Jining UniversityQufuShandong 273155China

Density functional theory(DFT)calculations were performed to gain an in-depth mechanistic understanding of Ni(0)-and Au(I)-catalyzed diastereoselective[4+2+1]cycloadditions between dienynes and diazo *** computational results indicate that,for both Ni(0)-and Au(I)-catalysis,transition-metal catalysts are more readily available to activate diazo compounds to form transition-metal carbene intermediates prior to the activation of the dienynes.

关键词： catalyzed stereoselective nickel

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C_(8)芳烃异构化径向床反应器数值模拟

石油炼制与化工 2025年第1期56卷 76-85页

作者：党辉鲍迪唐晓津侯栓弟康承琳中石化石油化工科学研究院有限公司北京100083 中石化(大连)石油化工研究院有限公司

为研究C_(8)芳烃异构化径向床反应器内部流场分布和反应性能,建立了C_(8)芳烃异构化径向床反应器模拟计算模型。通过引入多孔介质和反应动力学方程模型,对反应器内部流场和反应过程进行了模拟计算。结果表明,催化剂床层内,压力沿轴向由... 详细信息

为研究C_(8)芳烃异构化径向床反应器内部流场分布和反应性能,建立了C_(8)芳烃异构化径向床反应器模拟计算模型。通过引入多孔介质和反应动力学方程模型,对反应器内部流场和反应过程进行了模拟计算。结果表明,催化剂床层内,压力沿轴向由高到低呈下降趋势,速度呈现两端高、中间低的分布规律。沿径向方向,流体的流动压降较低。反应产物(对二甲苯)质量分数由扇形筒出口至中心管入口逐渐增大,且在不同轴向高度床层上变化规律相同。模拟计算得到的出口各组分质量分数与实际出口数据基本吻合,说明所建立的反应器模型能够较好地描述C_(8)芳烃异构化径向床反应器的反应性能。

关键词： C_(8)芳烃异构化径向床反应器计算流体力学(CFD) 反应动力学

Global exponential stability of Cohen-Grossberg neural networks with variable delays

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Applied Mathematics(A Journal of Chinese Universities) 2009年第2期24卷 167-174页

作者： ZHANG Li-juan SHI bao Naval Aeronautical Engineering Institute Naval Aeronautical and Astronautical University Yantai264005 China School of Mathematics and Information Science Yantai University Yantai 264005 China

A class of generalized Cohen-Grossberg neural networks（CGNNs） with variable de- lays are investigated. By introducing a new type of Lyapunov functional and applying the homeomorphism theory and inequality technique, some new conditions axe derived ensuring the existence and uniqueness of the equilibrium point and its global exponential stability for CGNNs. These results obtained are independent of delays, develop the existent outcome in the earlier literature and are very easily checked in practice.

关键词： Cohen-Grossberg neural network equilibrium point delay global exponential stability

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