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Structural, microstructural, transport, and magnetotransport properties of nanostructured La0.7Sr0.3MnO3 manganites synthesized by coprecipitation

Published online by Cambridge University Press:  31 January 2011

P.S. Solanki ,
R.R. Doshi ,
U.D. Khachar ,
M.V. Vagadia ,
A.B. Ravalia ,
D.G. Kuberkar  and
N.A. Shah
D.G. Kuberkar*
Affiliation:
Department of Physics, Saurashtra University, Rajkot - 360 005, India
N.A. Shah
Affiliation:
Department of Electronics, Saurashtra University, Rajkot - 360 005, India
*
a)Address all correspondence to this author. e-mail: dgkuberkar@rediffmail.com
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Abstract

The structural, transport, and magnetotransport properties of single-phase, homogeneous nanostructured La0.7Sr0.3MnO3 (LSMO) manganites synthesized by the coprecipitation route were investigated and the effect of sintering temperature on the microstructure of LSMO compounds was studied. A strong dependence of transport and magnetotransport behavior on the microstructure and nature of grain boundaries has been observed in the single-phase LSMO sintered at various temperatures. High-field magnetoresistance (HFMR) at room temperature is found to increase [13% (LS6) to 25% (LS9)] while low temperature (5 K) magnetoresistance decreases [75% (LS6) to 46% (LS9)] under 9 T field with increase in sintering temperature, which has been attributed to the spin-polarized tunneling and spin-dependent scattering of charge carriers.

Keywords

MicrostructureGrain BoundariesMagnetoresistance (transport)
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 9 , September 2010 , pp. 1799 - 1802
Copyright
Copyright © Materials Research Society 2010

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References

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