Goswami, Sudipta and Bhattacharya, Dipten and Choudhury, Pranab (2011) Particle size dependence of magnetization and noncentrosymmetry in nanoscale BiFeO(3). Journal of Applied Physics, 109 (7). Article Number:- 07D737 . ISSN 0021-8979

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The saturation magnetization (M(S)), antiferromagnetic transition point (T(N)), and the off-center displacements of Bi and Fe ions have been measured as a function of particle size in nanoscale BiFeO(3). TN decreases down to similar to 550 K for particles of size similar to 5 nm from similar to 653 K in bulk, while MS rises by more than an order of magnitude. Analysis of crystallographic structure from Rietveld refinement of x-ray diffraction patterns shows significant rise in off-center displacements of Bi (delta(Bi)) and Fe (delta(Fe)) ions within a unit cell with the decrease in particle size. The net unit-cell polarization PS too, is found to be larger in nanoscale regime. (c) 2011 American Institute of Physics. [doi: 10.1063/1.3567038]

Item Type: Article
Subjects: Electronics
Depositing User: Bidhan Chaudhuri
Date Deposited: 16 Jan 2012 12:11
Last Modified: 30 Mar 2016 06:09
URI: http://cgcri.csircentral.net/id/eprint/246

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