| 水热合成单晶La 1-x Ca x MnO3系列纳米线 |
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| 引用本文： | 晋传贵,张涛,李晓光.水热合成单晶La 1-x Ca x MnO3系列纳米线[J].无机材料学报,2007,22(2):243-246. |
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| 作者姓名： | 晋传贵 张涛 李晓光 |
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| 作者单位： | [1]安徽工业大学材料科学与工程学院,马鞍山243002 [2]安徽省金属材料与加工重点实验室,安徽工业大学,马鞍山243002 [3]中国科学技术大学物理系,合肥230026 |
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| 基金项目： | 海外杰出青年基金（51080202）;安徽省教育厅资助项目（2006KJ103B） |
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| 摘 要： | 采用水热法，成功地合成了一系列单晶La1-xCaxMnO3（x=0．3、0．5、0．75）纳米线．X射线衍射（XRD）的结果表明所制备的样品是纯的La1-xCaxMnO3正交相（x=0．3、0．5、0．75）纳米线．透射电子显微镜（TEM）的照片清晰地显示所制备的样品是由大量直径均匀（约90nm）、长度从几微米至几十微米的La1-xCaxMnO3的单晶纳米线构成．La0．5Ca0．5MnO3纳米线清晰的高分辨电子显微镜（HRTEM）的图片表明纳米线的表面是光滑的。没有任何缺陷且La0．5Ca0．5MnO3纳米线沿〈100〉方向生长．La0．5Ca0．5MnO3纳米线磁测量的结果表明相对于块材来说纳米线的疋有明显地提高，这是由于晶胞收缩和形状各向异性所致．
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| 关 键 词： | 水热法 La1-xCaxMnO3 纳米线 磁测量 |
| 文章编号： | 1000-324X（2007）02-0243-04 |
| 收稿时间： | 2006-4-27 |
| 修稿时间： | 2006-04-272006-07-10 |
Synthesis of a Series of Single-crystalline La 1-x Ca x MnO3 Nanowires by Hydrothermal Method |
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| JIN Chuan-Gui,ZHANG Tao,LI Xiao-Guang.Synthesis of a Series of Single-crystalline La 1-x Ca x MnO3 Nanowires by Hydrothermal Method[J].Journal of Inorganic Materials,2007,22(2):243-246. |
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| Authors: | JIN Chuan-Gui ZHANG Tao LI Xiao-Guang |
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| Affiliation: | 1. School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, China; 2 Anhui Key Laboratory of Metal Materials and Processing, Anhui University of Technology, Maanshan 243002; 3 Department of Physics, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | A series of single-crystalline La 1-x Ca x MnO 3 nanowires were successfully prepared by a hydrothermal method. X-ray diffraction (XRD) results demonstrate that theLa 1-x Ca x MnO 3 nanowires have orthorhombic perovskite structure without any impurity phases. Transmission electron microscope (TEM) images clearly show that the as-synthesized samples are made up of large quantities of single crystal nanowires with lengths ranging from several to several tens of micrometers and uniform diameter (about 90nm). The high-resolution transmission electron microscope(HRTEM)investigations of La 0.5 Ca 0.5 MnO 3 nanowires indicate that the nanowires have very clean surfaces without any defects and grow along <100> direction. The result of magnetic measurement indicates that the La 0.5 Ca 0.5 MnO3 nanowires have an enhanced Tc due to the shrinkage of unit cell volume and shape anisotropy. |
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| Keywords: | hydrothermal method La1-xCaxMnO3 nanowires magnetic measurement |
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