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Anomaly in structural noncentrosymmetry around TN n bulk and nanoscale BiFeO3

Published online by Cambridge University Press:  14 November 2013

Sudipta Goswami ,
Dipten Bhattacharya ,
Gail N. Iles ,
Barnali Ghosh ,
Anastasiia A. Prytuliak ,
Benoit Malard ,
Gopes C. Das ,
B. Ouladdiaf  and
T. Chatterji
Sudipta Goswami
Affiliation:
Nanostructured Materials Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India
Dipten Bhattacharya
Affiliation:
Nanostructured Materials Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India
Gail N. Iles
Affiliation:
Department of Crystallography, Helmholtz-Zentrum Berlin, 14109 Berlin, Germany
Barnali Ghosh
Affiliation:
Department of Materials Science, S.N. Bose National Center for Basic Sciences, Kolkata 700098, India
Anastasiia A. Prytuliak
Affiliation:
Science Division, Institut Laue-Langevin, BP 156, 38042 Grenoble, France
Benoit Malard
Affiliation:
Science Division, Institut Laue-Langevin, BP 156, 38042 Grenoble, France
Gopes C. Das
Affiliation:
School of Materials Science, Jadavpur University, Kolkata 700032, India
B. Ouladdiaf
Affiliation:
Science Division, Institut Laue-Langevin, B.P. 156, Grenoble 38042, France
T. Chatterji
Affiliation:
Science Division, Institut Laue-Langevin, B.P. 156, Grenoble 38042, France
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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.

PACS Nos. 75.70.Cn, 75.75.-c

Keywords

ferroicsstructural noncentrosymmetrypowder neutron diffractionnanoscale BiFeO3
Type
Technical Articles
Information
Powder Diffraction , Volume 28 , Supplement S2 , September 2013 , pp. S94 - S105
Copyright
Copyright © International Centre for Diffraction Data 2013 

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References

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