Study on the phase separation of La0.7Sr0.3MnO3 nanoparticles by electron magnetic resonance

被引：3

作者：

Wu, J. H. ^{[1
]}

Lin, J. G. ^{[1
,2
]}

机构：

[1] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 106, Taiwan

[2] Natl Taiwan Univ, Ctr Nanostorage Res, Taipei 106, Taiwan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2006年 / 304卷 / 01期

关键词：

La0.7Sr0.3MnO3; nanoparticles; CMR; Phase separation; Electron magnetic resonance;

D O I：

10.1016/j.jmmm.2006.02.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, the technique of electron magnetic resonance (EMR) is used to measure the magnetic resonant spectra of La0.7Sr0.3MnO3 nanoparticles synthesized by sol-gel routes with three different gelation agents (S1: Urea + citric acid; S2: citric acid, and S3: Urea + trisodium citrate). The purpose of this study is to investigate the influence of synthesis conditions on the magnetic properties of nanoparticles. Our ESR results show that Curie temperatures of La0.7Sr0.3MnO3 nanoparticles with different gelation agents are slightly different (T-c similar to 340 to 360 K) and possess both paramagnetic (PM) and ferromagnetic (FM) phases in the temperature below T-c. Besides, a sharp FM-PM transition indicates that the combined agent of Urea + tri-sodium citrate creates a better quality in CMR nanomagnets. (C) 2006 Elsevier B. V. All rights reserved.

引用

页码：E7 / E9

页数：3

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