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Preparation, Characterization, and Magnetic Studies of $Bi_{0.5}X_{0.5}(X = Ca, Sr)MnO_3$ Nanoparticles

Rao, SS and Bhat, SV (2007) Preparation, Characterization, and Magnetic Studies of $Bi_{0.5}X_{0.5}(X = Ca, Sr)MnO_3$ Nanoparticles. In: Journal of Nanoscience and Nanotechnology, 7 (6). pp. 2025-2028.

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Official URL: http://www.aspbs.com/jnn/

Abstract

Nanoparticles (dia. similar to 5-7 nm) of $Bi_{0.5}X_{0.5}(X = Ca, Sr)MnO_3$ 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: Journal Article
Additional Information: Copyright of this article belongs to American Scientific Publishers.
Keywords: Nanomanganites;Bicamn03;BisrmnO3;Charge Ordering
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 06 Aug 2007
Last Modified: 02 Feb 2012 09:35
URI: http://eprints.iisc.ernet.in/id/eprint/11655

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