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Particle size dependence of magnetization and noncentrosymmetry in nanoscale BiFeO(3)

IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata

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Title Particle size dependence of magnetization and noncentrosymmetry in nanoscale BiFeO(3)
 
Creator Goswami, Sudipta
Bhattacharya, Dipten
Choudhury, Pranab
 
Subject Electronics
 
Description 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]
 
Publisher American Institute of Physics
 
Date 2011-04
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://cgcri.csircentral.net/246/1/sudipta.pdf
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
 
Relation http://cgcri.csircentral.net/246/