Low-temperature synthesis, structural and magnetic properties of self-dopant LaMnO3+δ nanoparticles from a metal-organic polymeric precursor

被引：10

作者：

Ahmad, Tokeer ^{[1
]}

Lone, Irfan H. ^{[1
]}

Ubaidullah, Mohd. ^{[1
]}

Coolhan, Kelsey ^{[2
]}

机构：

[1] Jamia Millia Islamia, Dept Chem, Nanochem Lab, New Delhi 110025, India

[2] Rowan Univ, Dept Phys & Astron, Glassboro, NJ 08028 USA

来源：

MATERIALS RESEARCH BULLETIN | 2013年 / 48卷 / 11期

关键词：

Nanostructures; Oxides; Chemical synthesis; Electron microscopy; Magnetic properties; CATALYTIC-ACTIVITY; NONSTOICHIOMETRY; COPRECIPITATION; PEROVSKITES; ORDER;

D O I：

10.1016/j.materresbull.2013.08.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Self-dopant LaMnO3+delta nanoparticles have been successfully synthesized by metal citrate complex method based on Pechini-type reaction route, at low temperature (773 K). Powder X-ray diffraction and transmission electron microscope revealed pure and nanostructured phase of LaMnO3+delta (delta = 0.125) with an average grain size of similar to 72 nm (773 K) and similar to 80 nm (1173 K). DC-magnetization measurements under an applied magnetic field of H = +/- 60 kOe showed an increase in the magnetization with the increase of calcination temperature. Ferromagnetic nature shown by non-stoichiometric LaMnO3+delta was verified by well-defined hysteresis loop with large remanent magnetization (M-r) and coercive field (H-c). Surface areas of LaMnO3+delta nanoparticles were found to be 157.4 and 153 m(2) g(-1) for the samples annealed at 773 K and 1173 K, respectively. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：4723 / 4728

页数：6

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