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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Tc有明显地提高,这是由于晶胞收缩和形状各向异性所致．
A series of single crystal La1-xCaxMnO3 (x = 0.3,0.5,0.75) nanowires were successfully synthesized by hydrothermal method. The results of X-ray diffraction (XRD) showed that the prepared sample was pure La1-xCaxMnO3 quadrature phase (x = 0.3, 0.5, 0.75) nanowires. A photograph of a transmission electron microscope (TEM) clearly shows that the prepared sample is composed of a large number of single crystal nanowires of La1-xCaxMnO3 having a uniform diameter (about 90 nm) and a length of several micrometers to several tens of micrometers. La0.5Ca0.5MnO3 Nanowires A clear HRTEM image shows that the surface of the nanowires is smooth without any defects and the La0.5Ca0.5MnO3 nanowires grow in the <100> direction. The results of magnetic measurements of La0.5Ca0.5MnO3 nanowires show that the Tc of the nanowires is significantly higher than that of the bulk, due to the shrinkage of cells and anisotropy of shape.