Mossbauer study of nanocrystalline materials LaFeO<sub>3</sub>

Li Xi Cui Xianghao Liu Xuewu Jin Mingzhi Xiao Liangzhi Zhao Muyu

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Mossbauer study of nanocrystalline materials LaFeO₃

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- Mossbauer study of nanocrystalline materials LaFeO₃
- NUCLEAR TECHNIQUES Issue 1, (1993)
- 作者机构：
  
  1. 吉林大学
  2. 吉林大学,长春,130023
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：01 January 1993
- 稿件说明：
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[1]李熙,崔湘浩,刘学武,金明芝,肖良质,赵慕愚.钙钛矿型复合氧化物LaFeO_3纳米材料的穆斯堡尔谱研究[J].核技术,1993(01):24-28.

Li Xi Cui Xianghao Liu Xuewu Jin Mingzhi Xiao Liangzhi Zhao Muyu. Mossbauer study of nanocrystalline materials LaFeO₃[J]. Nuclear techniques, 1993, (1): 24-28.
[1]李熙,崔湘浩,刘学武,金明芝,肖良质,赵慕愚.钙钛矿型复合氧化物LaFeO_3纳米材料的穆斯堡尔谱研究[J].核技术,1993(01):24-28. DOI：

Li Xi Cui Xianghao Liu Xuewu Jin Mingzhi Xiao Liangzhi Zhao Muyu. Mossbauer study of nanocrystalline materials LaFeO₃[J]. Nuclear techniques, 1993, (1): 24-28. DOI：

摘要

在室温下用Mossbauer谱研究了具有不同晶粒尺寸、不同压力下压实的纳米晶材料LaFeO

。结果表明

70nm的常规LaFeO

晶粒呈反铁磁性结构

12.4nm的LaFeO

纳米晶是较弱的反铁磁结构和较强的超顺磁结构的叠加。纳米晶材料的界面/体相和超精细磁场随着压实力而改变。16nm的LaFeO

纳米晶的所有变化均小于12.4nm的LaFeO

纳米晶的变化。转靶XRD结果表明

经过不同压力压实的样品发生了晶粒碎化、晶间接触及位错等现象。

Abstract

Perovskite- type nanocrystalline materials LaFeO3 with different crystal sizes were synthesized. These samples with different compacting pressure were investigated by Mossbauer spectroscopy at room temperature. The results showed that the 70nm LaFeO3 crystals possessed an antiferromagnetic structure

and those of 12.4nm was a superposition of a weaker antiferromag- netic structure and a stronger superparamagnetic structure. The ratio of interface to crystal atoms and the hyperfine field in nanocrystals varied with compacting pressure. The results of rotating anode X- ray diffraction showed that the phenomena such as smashing

contact zone formation and dislocation occurred for the samples under a compacting pressure of 0.5

1.0 and 1.5 GPa respectively.

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Mossbauer study of nanocrystalline materials LaFeO3

DOI：

摘要

Abstract

关键词

Keywords

references

Mossbauer study of nanocrystalline materials LaFeO₃