Electron spin resonance study of Fe doping effect in La0.67Ca0.33MnO3

被引：9

作者：

Ning, Wei ^{[1
]}

Zhang, Xiang-Qun ^{[1
]}

Cheng, Zhao-Hua ^{[1
]}

Sun, Young ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2009年 / 321卷 / 09期

关键词：

Electron spin resonance; Manganite; Doping effect; COLOSSAL MAGNETORESISTANCE; HYPERFINE INTERACTIONS; MAGNETIC ORDER; DYNAMICS;

D O I：

10.1016/j.jmmm.2008.10.045

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electron spin resonance (ESR) study was carried out on La(0.67)Ca(0.33)Mn(1-x)FexO(3) (x = 0.0, 0.04) samples. The temperature dependence of the ESR spectra indicates the presence of phase separation above and below T-C in x = 0.0 and 0.04 sample, respectively. The increase of the g-value in the high-temperature region indicates the existence of local spin correlations even in the paramagnetic state. The activation energy obtained from both the temperature dependence of the ESR intensity and linewidth exhibits a smaller value in the Fe-doped sample. Our study suggests that the ferromagnetic spin correlations would be significantly weakened by a slight doping of Fe ions on Mn sites. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1159 / 1162

页数：4

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