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Preparation, characterization, and magnetic studies of Bi0.5X0.5(X =Ca, Sr)MnO3 nanoparticles

Rao, S.S. and Bhat, S. Venkataprasad (2007) Preparation, characterization, and magnetic studies of Bi0.5X0.5(X =Ca, Sr)MnO3 nanoparticles. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 7 (6). pp. 2025-2028. ISSN 1533-4880

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Abstract

Nanoparticles (dia. ∼5-7 nm) of Bi0.5X0.5(X = Ca, Sr)MnO3 are prepared by polymer assisted sol-gel method and characterized by various physico-chemical techniques. X-ray diffraction gives evidence for single phasic nature of the materials as well as their structures. Mono-dispersed to a large extent, isolated nanoparticles are seen in the transmission electron micrographs. High resolution electron microscopy shows the crystalline nature of the nanoparticles. Superconducting quantum interferometer based magnetic measurements from 10 K to 300 K show that these nanomanganites retain the charge ordering nature unlike Pr and Nd based nanomanganites. The CO in Bi based manganites is thus found to be very robust consistent with the observation that magnetic fields of the order of 130 T are necessary to melt the CO in these compounds. These results are supported by electron magnetic resonance measurements.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Physical Science > Nano objects
Physical Science > Nanomagnetics
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:3921
Deposited By:JNCASR
Deposited On:27 Jan 2009 04:07
Last Modified:11 Feb 2009 12:18

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