Reverse micellar synthesis and properties of nanocrystalline GMR materials (LaMnO3, La0.67Sr0.33MnO3 and La0.67Ca0.33MnO3):: Ramifications of size considerations

被引：35

作者：

Ahmad, Tokeer

Ramanujachary, Kandalam V.

Lofland, Samuel E.

Ganguli, Ashok K. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem, New Delhi 110016, India

[2] Rowan Univ, Ctr Mat Res & Educ, Glassboro, NJ 08028 USA

来源：

JOURNAL OF CHEMICAL SCIENCES | 2006年 / 118卷 / 06期

关键词：

reverse micellar synthesis; nanomaterials; magnetism; rare-earth manganites;

D O I：

10.1007/BF02703948

中图分类号：

O6 [化学];

学科分类号：

0703 [化学];

摘要：

Nanoparticles of complex manganites (viz. LaMnO3, La0.67Sr0.33MnO3 and La0.67Ca0.33MnO3) have been synthesized using the reverse micellar route. These manganites are prepared at 800 degrees C and the monophasic nature of all the oxides has been established by powder X-ray diffraction studies. TEM studies show an average grain size of 68, 80 and 50 nm for LaMnO3, La0.67Sr0.33MnO3 and La0.67Ca0.33MnO3 respectively. Ferromagnetic ordering is observed at around 250 K for LaMnO3, 350 K for La0.67Sr0.33MnO3 and 200 K for La0.67Ca0.33MnO3. These Curie temperatures correspond well with those reported for bulk materials with similar composition.

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页码：513 / 518

页数：6

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