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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