Goswami, Sudipta and Bhattacharya, Dipten and Iles, Gail N and Ghosh, Barnali and Prytuliak, Anastasiia A and Malard, Benoit and Das, Gopes C and Ouladdiaf, B and Chatterji, T
(2013)
Anomaly in structural noncentrosymmetry around T-N in bulk and nanoscale BiFeO3.
Powder Diffraction, 28 (2).
S94-S105.
ISSN 0885-7156
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 T-N for bulk and nanoscale BiFeO3. It appears that the structural noncentrosymmetry - which gives rise to the ferroelectric polarization - is suppressed anomalously by similar to 1% (of the average noncentrosymmetry at above the magnetic transition) in the bulk sample and by similar to 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.
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