Document Detail

High pressure Raman investigations of multiferroic BiFeO(3).
MedLine Citation:
PMID:  21832378     Owner:  NLM     Status:  In-Data-Review    
We have reported a Raman scattering investigation of bismuth ferrite (BiFeO(3)) under high pressure up to 50 GPa. Distinct changes in the Raman spectra show evidence for three pressure-induced structural transitions. The abrupt frequency redshifts of the Raman modes near 300 cm(-1) at around 3 GPa are attributed to the modulation of the FeO(6) octahedral tilts. The disappearance of the modes below 250 cm(-1) at 8.6 GPa, together with the enhancement of the two modes in the range of 300-400 cm(-1), indicate the phase transition from the rhombohedral to orthorhombic symmetry. Afterward, the E-3 and E-4 modes disappear at 44.6 GPa, pointing to the occurrence of the orthorhombic-cubic phase transition, which is consistent with the previous postulate that an orthorhombic-cubic transition takes place across the metal-insulator transition at high pressures.
Y Yang; L G Bai; K Zhu; Y L Liu; S Jiang; J Liu; J Chen; X R Xing
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Publication Detail:
Type:  Journal Article     Date:  2009-08-24
Journal Detail:
Title:  Journal of physics. Condensed matter : an Institute of Physics journal     Volume:  21     ISSN:  1361-648X     ISO Abbreviation:  J Phys Condens Matter     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2011-08-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101165248     Medline TA:  J Phys Condens Matter     Country:  England    
Other Details:
Languages:  eng     Pagination:  385901     Citation Subset:  IM    
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
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