Anomaly in structural noncentrosymmetry around TNn bulk and nanoscale BiFeO3

Goswami, S, Bhattacharya, D, Iles, G, Ghosh, B, Prytuliak, A, Malard, B, Das, G, Ouladdiaf, B and Chatterji, T 2013, 'Anomaly in structural noncentrosymmetry around TNn bulk and nanoscale BiFeO3', Powder Diffraction, vol. 28, no. 2, pp. 94-105.

Document type: Journal Article
Collection: Journal Articles

Title Anomaly in structural noncentrosymmetry around TNn bulk and nanoscale BiFeO3
Author(s) Goswami, S
Bhattacharya, D
Iles, G
Ghosh, B
Prytuliak, A
Malard, B
Das, G
Ouladdiaf, B
Chatterji, T
Year 2013
Journal name Powder Diffraction
Volume number 28
Issue number 2
Start page 94
End page 105
Total pages 12
Publisher International Centre for Diffraction Data
Abstract Using high resolution powder neutron diffraction data, we show that there is a distinct anomaly in the structural noncentrosymmetry around the magnetic transition point TN for bulk and nanoscale BiFeO3. It appears that the structural noncentrosymmetry - which gives rise to the ferroelectric polarization - is suppressed anomalously by ~1% (of the average noncentrosymmetry at above the magnetic transition) in the bulk sample and by ~12% in the nanoscale sample as the magnetic transition is approached from higher temperature. This observation shows that the multiferroic coupling improves in the nanoscale sample which is expected to brighten the application prospects of nanoscale BiFeO3 in nanospintronics-based sensor devices.
Subject Electronic and Magnetic Properties of Condensed Matter; Superconductivity
Keyword(s) multiferroics
structural noncentrosymmetry
powder neutron diffraction
nanoscale BiFeO3
DOI - identifier 10.1017/S0885715613001115
Copyright notice © 2013 JCPDS-ICDD © International Centre for Diffraction Data 2013
ISSN 0885-7156
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