溶胶—凝胶法制备Sr_2FeMoO_6纳米晶  

Preparation of nanocystanine Sr_2FeMoO_6 by Sol-Gel method

作　　者：李凌辉[1] 熊宏齐[1] 翟亚[1] 朱延技[1] 

机构地区：[1]东南大学物理系,江苏南京210096

出　　处：《化工时刊》2004年第7期19-21,共3页Chemical Industry Times

摘　　要：本文应用溶胶—凝胶法制备了双钙钛矿结构巨磁电阻 (colossalmagnetoresistance)材料Sr2 FeMoO6。用X射线粉晶衍射对其进行了物相鉴定 ,表明在 14 73K已经得到较好的Sr2 FeMoO6产物 ,分析结果证明得到的产物为纳米粉末态晶体 ,平均粒径为 39nm。磁测量表明该样品Tc高于室温且具有较大的磁电阻。In this paper,the Sol-Gel method is used to fabricate nanocrystalline Sr_2FeMoO_6,which is the double perovskite oxide with colossal magnetoresistance(CMR).X-ray diffraction studies show that the sample is composed of nanocrystalline powder Sr_2FeMoO_6 after sintering at 1 473K,and the average size of grain is 39nm.Magnetization measurements demonstrate that the sample has a large magnetoresistance and the curie temperature is above room temperature.

关 键 词：溶胶-凝胶法 制备 Sr2FeMoO6 纳米晶 双钙钛矿 磁电阻 

分 类 号：O614[理学—无机化学]