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稀土氧化钕对铝酸盐长余辉发光材料性能的影响

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中国稀土学报 2001年第6期19卷 599-601页

作者：何大伟崔兴龙北方交通大学光电子技术研究所信息存储显示与材料开放实验室北京100044

制备了SrAl2 O4 ∶Eu2 + ,Nd3. 和SrAl2 O4 ∶Eu2 + ,Dy3. ,Nd3. 长余辉材料 ,研究了所合成的材料在不同波段紫外光激发条件下的发光光谱和激发光谱的差异和Eu2 + ,Dy3. ,Nd3. 的摩尔掺杂浓度对材料的余辉性能的影响等。

关键词：稀土 SrAl2O4:Eu^2+,Dy^3. 陷井中心铝酸盐长余辉发光材料氧化钕发光性能

Progress on two-dimensional ferrovalley materials

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Chinese Physics B 2024年第1期33卷 32-43页

作者：李平刘邦陈帅张蔚曦郭志新 State key Laboratory for Mechanical Behavior of materials Center for Spintronics and Quantum SystemSchool of Materials Science and EngineeringXi'an Jiaotong UniversityXi'an 710049China State key Laboratory for Surface Physics and Department of Physics Fudan UniversityShanghai 200433China Jinan Aviation Repair Factory Jinan 250000China Department of Physics and electronic Engineering Tongren UniversityTongren 554300China

The electron's charge and spin degrees of freedom are at the core of modern electronic devices. With the in-depth investigation of two-dimensional materials, another degree of freedom, valley, has also attracted tremendous research interest. The intrinsic spontaneous valley polarization in two-dimensional magnetic systems, ferrovalley material, provides convenience for detecting and modulating the valley. In this review, we first introduce the development of ***, the valley polarization forms by the p-, d-, and f-orbit that are discussed. Following, we discuss the investigation progress of modulating the valley polarization of two-dimensional ferrovalley materials by multiple physical fields, such as electric, stacking mode, strain, and interface. Finally, we look forward to the future developments of valleytronics.

关键词： ferrovalley valley polarization two-dimensional materials multi-field tunable

Effects of the 3. transition metal doping on the structural, electronic, and magnetic properties of BeO nanotubes

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Chinese Physics B 2014年第1期23卷 357-362页

作者：张建民宋婉婷李欢欢徐可为 JiVincent College of Physics and Information Technology Shaanxi Normal University Xi 'an 710062 China State key Laboratory for Mechanical Behavior of materials Xi'an Jiaotong University Xi' an 710049 China ICMMO/LEMHE Universitd Paris-Sud 1191405 Orsay Cedex France

First-principles calculations have been performed on the structural, electronic, and magnetic properties of seven 3. transition-metal （TM） impurities （V, Cr, Mn, Fe, Co, Ni, and Cu） doped armchair （5,5） and zigzag （8,0） beryllium oxide nanotubes （BeONTs）. The results show that there exists a structural distortion around the 3. TM impurities with respect to the pristine BeONTs. The magnetic moment increases for V- and Cr-doped BeONTs and reaches a maximum for Mn-doped BeONT, and then decreases for Fe-, Co-, Ni-, and Cu-doped BeONTs successively, consistent with the predicted trend of Hund＇s rule to maximize the magnetic moments of the doped TM ions. However, the values of the magnetic moments are smaller than the predicted values of Hund＇s rule due to the strong hybridization between the 2p orbitals of the near O and Be ions of BeONTs and the 3. orbitals of the TM ions. Furthermore, the V-, Co-, and Ni-doped （5,5） and （8,0） BeONTs with half-metal ferromagnetism and thus 100% spin polarization character are good candidates for spintronic applications.

关键词： BeO nanotubes,transition-metal atoms half-metal ferromagnets first-principles calculation

The factor contribution to the Chinese industry growth:1952-2007

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The factor contribution to the Chinese industry growth:1952-...

2011 International Conference on Business Management and electronic Information(BMEI 2011)

作者： Zeng xian-feng School of business xi’an International Studies university xi’an china Li Guo-ping School of Economics & Finance xi’an jiaotong university xi’an china

Using the parameter estimation method and latent variable approach,this paper investigates china’s industrial output elasticity and TFP growth,and estimate the contribution of various factors to output growth from 1952 to *** main findings are that the growth mode of industrial is extensive from 1952 to *** the importance of each factors to growth have phased characteristics,especially between 1996 and 2007,the contribution of intelligence factors exceeded that of primary inputs in the first *** shows that the growth mode start the transformation from extensive to intensive in china’s *** order to provide the continuous driving force for Chinese industry growth by technological progress,it is necessary to keep the elasticity of capital from *** the same time,we should fulfill the effect of human capital

关键词： growth factor total factor productivity human capital

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复相弛豫铁电陶瓷的相组成与介电性能

无机材料学报 1997年第5期12卷 710-714页

作者：岳振星王晓莉张良莹姚熹西安交通大学电子材料研究室

采用两相混合烧结法在Pb（Zn1／3.b2／3.O3.BaTiO3.PbTiO3.统中制备了弛豫铁电陶瓷材料．相组成研究表明，该陶瓷具有两相共存的复相结构．对复相陶瓷的介电性能进行了研究，结果表明，复相结构可有效地改善弛豫铁电陶瓷的介温特性... 详细信息

采用两相混合烧结法在Pb（Zn1／3.b2／3.O3.BaTiO3.PbTiO3.统中制备了弛豫铁电陶瓷材料．相组成研究表明，该陶瓷具有两相共存的复相结构．对复相陶瓷的介电性能进行了研究，结果表明，复相结构可有效地改善弛豫铁电陶瓷的介温特性、频率特性和介质老化性能．

关键词：弛豫铁电体铌锌酸铅陶瓷介电性能铁电体

EFFECT OF A VISCOUS LIQUID LAYER ON THE TRANSVERSE SURFACE WAVES IN TRANSVERSELY PIEZOELECTRIC materials WITH UNATTACHED ELECTRODE

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EFFECT OF A VISCOUS LIQUID LAYER ON THE TRANSVERSE SURFACE W...

Sol-Gel synthesis of luminescent InP nanocrystals embedded in silica glasses

2010全国压电和声波理论及器件技术研讨会

作者： Feng JIN~1,Peng LI~1,Zheng-hua QIAN~2 1 MOE key Laboratory for Strength and Vibration,School of Aerospace,xi'an jiaotong university xi'an,Shaanxi {3.,P.R.china 2 Department of Mechanical and Environmental Informatics,Tokyo Institute of Technology Tokyo 152-8550,Japan

The propagation of the transverse surface waves in an unbounded piezoelectric half-space with a viscous liquid layer between the half-space surface and an unattached electrode is *** exact dispersion relation is obtained from the equations of the linear theory of *** show that the wave speed is sensitive to the viscous coefficient,the mass density and the dielectric permittivity of the fluid layer. Especially,the phase velocity changes linearly with the increasing mass density when other parameters keep constant,which can be used to manipulate the behavior of the waves and has implications in acoustic wave devices.

关键词： Transverse surface waves a viscous liquid layer dispersion relation

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Sol-Gel synthesis of luminescent InP nanocrystals embedded i...

锆钛酸铅铁电薄膜的制备及在红外探测器中的应用

2004全国太阳能光化学与光催化学术会议

作者： HeqingYang, Darning Huang xi Yao, xingjun Wang, Songhai xie, Yu Fang, Shouxin Liu, xiaoxiao Gu, and Fujian Wang (School of Chemistry & Material Science, Shaanxi Normal university, xian 710062, china Surface Physics Laboratory, Fudan university, Shanghai 20043., china electronic materials research Laboratory, xian jiaotong university, xian 710049, china Department of Chemistry, Fudan university, Shanghai 20043., china

＜正＞ Ⅲ-Vsemiconductor nanocrystals rarely exist as spherical inclusions inside glasses,due to difficultiesduring their preparation。such aS high toxic reagents or fast oxidation under usual glass *** this report a sol-gel method for synthesis of InP nanocrystals embedded in silica glasseswas *** were synthesized by hydrolysis of a complex solution of Si（OC2Hs）4,InCl3.4H2O andPO（OC2H5）***,the gels were heated at 600℃in the presence of H2 gas to form fine cubic *** spectrum showed InP longitudinal-optic mode（3.2cm-1）and transverse-optic mode

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太原理工大学学报 2004年第4期35卷 388-391页

作者：李建康姚熹西安交通大学电子材料研究所

研究了敏感元材料锆钛酸铅(PZT)铁电薄膜的制备、结构和性能,并采用半导体光刻工艺和化学腐蚀的方法成功地对PZT铁电薄膜进行了刻蚀,同时采用剥离技术对相应的电极实现了图形化。该研究为铁电薄膜在热释电红外探测器中的应用奠定了基础。

关键词：热释电探测器敏感元光刻剥离

Abnormal dielectric characteristics of PMN- 3.% PT single crystal under dc bias

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Chinese Science Bulletin 2003年第19期48卷 2038-2040页

作者： xi Zengzhe LI Zhenrong XU Zhuo ZHANG Liangying YAO xi Functional materials research Laboratory Tongji University Shanghai 200092. China key Laboratory of the ministry of education Xi'an Jiaotong University Xi'an 710049 China

The dielectric properties and phase transition behavior of the [001] and [111] oriented PMN-3.%PT single crystal under the different dc bias (E) have been investigated as a function of temperatures. Under the application of dc bias ranging from 1.5 to 4.0 kV/cm, the dielectric spectrum of a [001] oriented single crystal showed an abnormal dielectric peak within the rhombic phase-stable temperature range. However, this peak disappeared at E>4.0 kV/cm and was not yet found in the [111] oriented single crystal. The abnormal dielectric peak was attributed to the filed-induced phase transition.

关键词：不规则电介质 PMN-PT 单晶铁电体相转换