| 层状钙钛矿巨磁阻材料La_(1.2-x)Nd_xSr_(1.8)Mn_2O_7的微结构研究 |
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| 引用本文： | 王明光,祁阳.层状钙钛矿巨磁阻材料La_(1.2-x)Nd_xSr_(1.8)Mn_2O_7的微结构研究[J].东北大学学报(自然科学版),2009,30(3):396-399. |
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| 作者姓名： | 王明光 祁阳 |
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| 作者单位： | 东北大学理学院,辽,宁沈阳,110004 |
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| 摘 要： | 利用X射线衍射仪(XRD)和透射电子显微镜(TEM)及高分辨电子显微镜(HREM)研究了层状巨磁电阻材料La1.2-xNdxSr1.8Mn2O7(x=0.2)的显微结构.研究结果表明,Nd掺杂氧化物La1.2Sr1.8Mn2O7仍具有四方对称性,即掺杂Nd没有改变原有的晶体结构.通过HREM观察发现,Nd掺杂氧化物La1.2Sr1.8Mn2O7含有较多的缺陷,其中包括与其他RP相形成的共生结构、(101)剪切结构以及一些比较复杂的缺陷结构.
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| 关 键 词： | 巨磁阻 高分辨电子显微镜 共生结构 结晶学 结晶学剪切结构 |
Microstructural Study of Layered Colossal Magnetoresistance Material La_(1.2-x)Nd_xSr_(1.8)Mn_2O_7 |
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| WANG Ming-guang,QI Yang.Microstructural Study of Layered Colossal Magnetoresistance Material La_(1.2-x)Nd_xSr_(1.8)Mn_2O_7[J].Journal of Northeastern University(Natural Science),2009,30(3):396-399. |
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| Authors: | WANG Ming-guang QI Yang |
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| Institution: | WANG Ming-guang,QI Yang(School of Sciences,Northeastern University,Shenyang 110004,China.) |
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| Abstract: | The microstructure of layered colossal magnetoresistance material La1.2xNdxSr1.8Mn2O7(x=0.2) was investigated by X-ray diffraction(XRD),transmission electron microscopy(TEM) and high-resolution electron microscopy(HREM).The results showed that La1.2-xNdxSr1.8Mn2O7(x=0.2) is of tetragonal structure and Nd-doping has not evidently changed its structure.HREM results showed that many defects exist in the Nd-doped oxide La1.2Sr1.8Mn2O7,such as intergrowth structures formed between matrix and other RP phase,(101)... |
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| Keywords: | colossal magnetoresistance high-resolution electron microscopy(HREM) intergrowth structure crystallographic shear structure |
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