Issue 8, 2002
From the journal:

Journal of Materials Chemistry

Enhanced magnetoresistance in Sr2FeMoO6 by combustion synthesis

Munuswamy Venkatesan,a   Upadhyayula V. Varadaraju,b   Alexios P. Douvalis,a   Ciara B. Fitzgerald,a   Fernando M. F. Rhena  and  J. Michael D. Coey*a  

* Corresponding authors

a Physics Department, Trinity College Dublin, Dublin 2, Ireland

b Materials Science Research Centre and Department of Chemistry, Indian Institute of Technology, Madras, India

Abstract

A novel method of producing magnetoresistive oxides is described, which involves low temperature combustion synthesis from a mixture of nitrates and fuel, as applied to Sr2FeMoO6. The method yields ceramics with a fine crystallite size of 100–200 nm and a room temperature resistivity of 200 µΩ m. Low field magnetoresistance (6.5% in 0.1 T) is enhanced dramatically compared to samples prepared by conventional solid-state reaction due to the efficient intergrain tunnelling arising from the high density of grain boundaries. Magnetoresistance in low fields is essentially independent of temperature from 5–300 K, and it persists up to 350 K, providing the prospect of sensor applications in an extended temperature range.

Graphical abstract: Enhanced magnetoresistance in Sr2FeMoO6 by combustion synthesis

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Article information

DOI
https://doi.org/10.1039/B204540K
Article type
Communication
Submitted
13 May 2002
Accepted
18 Jun 2002
First published
27 Jun 2002

J. Mater. Chem., 2002,12, 2184-2186

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Enhanced magnetoresistance in Sr2FeMoO6 by combustion synthesis

M. Venkatesan, U. V. Varadaraju, A. P. Douvalis, C. B. Fitzgerald, F. M. F. Rhen and J. M. D. Coey, J. Mater. Chem., 2002, 12, 2184 DOI: 10.1039/B204540K

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