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CuO掺杂量对lsmo/NiCuZn复合材料微波特性的影响

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电子元件与材料 2010年第8期29卷 8-10,17页

作者：邓金亮梁迪飞温柏龙翁小龙电子薄膜与集成器件国家重点实验室四川成都610054 隐身材料与技术教育部工程研究中心四川成都610054

采用固相反应法制备了La0.67Sr0.33MnO3/(Zn0.6Fe0.4)[Ni0.4-xCuxFe1.6]O4(lsmo/NiCuZn)铁氧体复合材料。研究了CuO掺杂量对复合材料在1MHz～1.8GHz频段下的复磁导率频谱特性和复介电常数频谱特性的影响。结果表明:CuO掺杂量的增加(x=0.05～0.20),提高了复合材料磁谱与介电谱的虚部,增加了材料的磁损耗与介电损耗,提高了材料的吸波性能。当CuO的掺杂量x为0.20时,复合材料磁导率和介电常数的虚部分别达到27和107。

关键词： lsmo NiCuZn 复合隐身材料微波特性

lsmo/TO薄膜p-n结微观结构对整流特性影响的研究

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电子显微学报 2006年第B08期25卷 83-84页

作者：王珂李彤韩晓东张泽北京工业大学固体微结构与性能研究所北京100022

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磁性电极作为衬底的有机电致发光器件

红外与激光工程 2015年第7期44卷 2105-2109页

作者：关云霞陈丽佳陈平牛连斌重庆师范大学物理与电子工程学院重庆市光电功能材料重点实验室重庆市高校光学工程重点实验室重庆401331 西南大学物理科学与技术学院重庆400715

有机电致发光器件(Organic Light-Emitting Device,OLED)已成为当今最热门的研究领域之一。以钛酸锶(100)作为基底,采用RF磁控溅射镀膜系统制成磁性电极La1-xSrxMn O3(lsmo)薄膜,为了增加钛酸锶基底lsmo薄膜的透光率,对该基底进行了双... 详细信息

有机电致发光器件(Organic Light-Emitting Device,OLED)已成为当今最热门的研究领域之一。以钛酸锶(100)作为基底,采用RF磁控溅射镀膜系统制成磁性电极La1-xSrxMn O3(lsmo)薄膜,为了增加钛酸锶基底lsmo薄膜的透光率,对该基底进行了双面光学抛光。在此基础上,以lsmo为衬底,制作了结构为lsmo/NPB/Alq3/Cs F/Mg:Ag的有机电致发光器件。器件大约在14 V时启亮,在25 V时,器件达到最大亮度。在磁场作用下,研究了器件的亮度-电压-电流特性。在大约150 m T磁场下,器件的发光亮度增大10%。研究结果表明:由于经lsmo注入发光层内部的电子和空穴自旋方向被部分极化,发光层单线态与三线态激子的形成比率增加。由于发光材料Alq3是单线态有机材料,因而,器件发光亮度增大。

关键词：有机电致发光器件 lsmo 磁场

Effect of oxygen pressure on electrical transport properties for(110) oriented La_(2/3)Sr_(1/3)MnO_3 films directly deposited on silicon

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Journal of Rare Earths 2013年第4期31卷 376-380页

作者：李廷先李扩社于敦波张飞鹏张铭于凤军 College of Physics and Electrical Engineering Anyang Normal University National Engineering Research Center for Rare earth Materials General Research Institute for Nonferrous MetalsGrirem Advanced Materials Co.Ltd. Department of Mathematics and Physics Henan University of Urban Construction College of Materials Science and Engineering Beijing University of Technology

La2/3Sr1/3MnO3 films with （110） preferred orientation were deposited on Si （100） substrate without any buffer layer by pulsed laser deposition technique. Effect of oxygen pressure on orientation, surface morphology, and electrical transport properties were investigated. The film deposited at 10 Pa presented （110） preferred orientation with the best crystalline quality, the largest grain size, and the smallest roughness. The （110） oriented film presented higher metal-insulator transition temperature, and the lower resis- tivity than that of the samples without preferred orientation.

关键词： colossal magnetoresistive film lsmo pulsed laser deposition electrical transport rare earths

Synthesis of Ordered Ultra-long Manganite Nanowires via Electrospinning Method

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Chinese Physics Letters 2016年第9期33卷 116-119页

作者：郑俊杜恺肖迪周正阳魏文刚陈金杰殷立峰沈健 State Key Laboratory of Surface Physics and Department of Physics Fudan University College of Physics Science and Information Engineering Hebei Normal University Collaborative Innovation Center of Advanced Microstructures

We develop a new electrospinning method to prepare ultra-long ordered La1-xSrxMnO3 （lsmo） nanowires. The length is up to several centimeters and is only limited by the size of the collector. The well-ordered straight-line structure ensures the transport measurement, which is impossible to be carried out for the random nanowires fabricated by the traditional electrospinning method. Magnetic and transport measurements indicate that the physical properties of the lsmo nanowires depend sensitively on the doping concentration. At the optimum doping, the lsmo wires are ferromagnetic at room temperature with a metal-insulator transition temperature close to room temperature. Magnetic force microscopy studies are also performed to provide a microscopic view of these ultra-long nanowires.

关键词： of on is by as for Synthesis of Ordered Ultra-long Manganite Nanowires via Electrospinning Method lsmo

Effect of Terraces at the Interface on the Structural and Physical Properties of La_(0.8)Sr_(0.2)MnO_3 Thin Films

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Chinese Physics Letters 2016年第7期33卷 124-128页

作者：冯雅晴金奎娟葛琛何旭谷林杨振中郭海中万骞何萌吕惠宾杨国桢 Institute of Physics Chinese Academy of Sciences Collaborative Innovation Center of Quantum Matter

Employing atomic force microscopy, transmission electron microscopy and the second harmonic generation tech- nique, we carefully explore the structural properties of 6-unit-cell-thick La0.8Sr0.2 MnO3 films grown on SrTiO3 with atomically fiat TiO2-terminated terraces on the surface. The results clearly demonstrate that the terraces on the surface of TiO2-terminated SrTiO3 can improve the layer-by-layer epitaxial growth of the manganite films, which results in uniform film coverage at the beginning of growth and thus reduces the substrate-induced disorder at or near the interface. Comparing the magnetic and transport properties of La0.8Sr0.2NlnO3 films with the thicknesses varying from 6 unit cells to 80 unit cells grown respectively on as-received SrTi03 and TiO2- terminated SrTiO3, it is found that these atomically flat terraces on the surface of TiO2-terminated SrTiO3 can greatly enhance the Curie temperature and conductivities of the ultrathin La0.8Sr0.2MnO3 films with thickness less than 50 unit cells, while no obvious difference is detected in the magnetic and transport properties of the 80 unit-cell thick films.

关键词： STO in of on lsmo Sr

Conductivity and electric properties of La_(1-x)Sr_xMnO_(3-δ)nanopowders

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Journal of Rare Earths 2009年第4期27卷 651-654页

作者： R.J.Wiglusz A.Gaki G.Kakali A.Chuchmaa W.Strek Institute for Low Temperature and Structure Research Polish Academy of Sciences P.O.Box 937 50-442 Wroctaw Poland Chemical Engineering Department National Technical University Athens 9 Heroon Polytechniou Str. 15773 Athens Greece Electrotechnical Institute Division Electrotechnology and Materials Wroctaw Poland

La1-xSrxMnO3-δ was synthesized by the Pechini＇s method. The XRD pattern and TEM indicate the formation of the perovskite without the presence of secondary phases. It was found that La0.8Sr0.2MnO3-δsample prepared at 1000℃ in air atmospheres, contains about 13.11% of the manganese as Mn4＋ and 86.89% of the manganese as Mn3＋. The electric measurements were carded out for La0.8Sr0.2MnO3-δ nanoceramics by using impedance spectroscopy methods and found to be 0.1 S/cm at 250 ℃ similar to the typical value of La0.8Sr0.2MnO3-δ materials. Its dependence on reciprocal temperature shows quite complicated mechanism of conduction.

关键词： lsmo Pechini's method perovskite impedance spectroscopy rare earths

Emissivity of La_(1-x)Sr_xMnO_3/acrylic Resin Thermal Control Coating

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稀有金属材料与工程 2012年第S1期41卷 253-255页

作者： Yukimura Ken Harbin Institute of Technology Harbin 150001China

Thermal control coatings were fabricated by mixing of La1-xSrxMnO3(lsmo)powder and acrylic resin and brushed on Al alloy *** powders of La0.7Sr0.3MnO3 and La0.8Sr0.2MnO3 were prepared using sol-gel *** results reveal the phase structure of lsmo powders are *** transition temperature from metal to insulator of La0.7Sr0.3MnO3 and La0.8Sr0.2MnO3 are 300 and 275 K,*** emissivity evolution with temperature of the coatings was *** La0.7Sr0.3MnO3/acrylic resin coating,the emissivity increases from 0.56 to 0.88,and for La0.7Sr0.3MnO3/acrylic resin coating from 0.50 to 0.90.

关键词： thermal control coatings lsmo emissivity

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磁电双层膜层间耦合的弹性力学研究

物理学报 2008年第5期57卷 3237-3243页

作者：曹鸿霞张宁南京师范大学磁电子学实验室南京210097

基于磁致伸缩相与压电相的本构方程,应用弹性力学模型,简要介绍了如何推导自由状态的磁电双层膜纵向、横向磁电(ME)电压系数.并采用相应的材料参数计算了La0.7Sr0.3MnO3-Pb(Zr,Ti)O3(lsmo-PZT),Tb1-xDyxFe2-y(TDF)-PZT双层膜中的磁电电... 详细信息

基于磁致伸缩相与压电相的本构方程,应用弹性力学模型,简要介绍了如何推导自由状态的磁电双层膜纵向、横向磁电(ME)电压系数.并采用相应的材料参数计算了La0.7Sr0.3MnO3-Pb(Zr,Ti)O3(lsmo-PZT),Tb1-xDyxFe2-y(TDF)-PZT双层膜中的磁电电压系数,具体分析了其与压电相的体积分数v、界面耦合参数k以及偏置磁场H之间的关系.分析结果表明,在某一体积分数vm下,ME电压系数达到最大值,且最大值与k成近似线性关系.由于TDF的超大磁致伸缩效应,TDF-PZT双层膜的横向ME电压系数可达1.9Vcm-1Oe-1,而lsmo-PZT的仅为165mVcm-1Oe-1(1Oe=80A/m).将lsmo-PZT中横向ME电压系数随偏置磁场H变化的理论值与实验结果进行对照,其界面耦合参数k为0.2.研究结果表明:优异的磁致伸缩性能、合适的体积分数、良好的界面耦合是影响ME效应的关键因素.

关键词：磁电效应双层膜 TDF lsmo PZT