东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2009, Vol. 30 ›› Issue (3): 396-399.DOI: -

• 论著 • 上一篇    下一篇

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

王明光;祁阳;   

  1. 东北大学理学院;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2009-03-15 发布日期:2013-06-22
  • 通讯作者: Qi, Y.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50572013)

Microstructural study of layered colossal magnetoresistance material La1.2-xNdxSr1.8 Mn2O7

Wang, Ming-Guang (1); Qi, Yang (1)   

  1. (1) School of Sciences, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-03-15 Published:2013-06-22
  • Contact: Qi, Y.
  • About author:-
  • Supported by:
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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.

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

Abstract: The microstructure of layered colossal magnetoresistance material La1.2-xNdxSr1.8 Mn2O7 (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-xNdxSr1.8 Mn2O7 (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 La1.2 Sr1.8Mn2O7, such as intergrowth structures formed between matrix and other RP phase, (101) crystallographic shear structures and some more complicated defective structures.

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