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Low-temperature polymer precursor-based synthesis of nanocrystalline particles of lanthanum calcium manganese oxide $(La_{0.67}Ca_{0.33}MnO_{3})$ with enhanced ferromagnetic transition temperature

Shankar, Shantha K and Raychaudhuri, AK (2006) Low-temperature polymer precursor-based synthesis of nanocrystalline particles of lanthanum calcium manganese oxide $(La_{0.67}Ca_{0.33}MnO_{3})$ with enhanced ferromagnetic transition temperature. In: Journal of Materials Research, 21 (1). pp. 27-33.

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Abstract

We report a simple modified polymeric precursor route for the synthesis of highly crystalline and homogenous nanoparticles of lanthanum calcium manganese oxide (LCMO). The LCMO phase formation was studied by thermal analysis, x-ray powder diffraction, and infrared spectroscopy at different stages of heating. These nanocrystallites (average particle size of 30 nm) possess ferromagnetic-paramagnetic transition temperature $(T_{c})$) of 300 K, about 50 K higher than that of a single crystal. The Rietveld analysis of the powder x-ray diffraction data of the nanopowders reveals significant lattice contraction and reduction in unit cell anisotropy-these structural changes are correlated to the enhancement in $T_{c}$.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Materias Research Society.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 28 Feb 2006
Last Modified: 27 Aug 2008 11:48
URI: http://eprints.iisc.ernet.in/id/eprint/5743

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