Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/14110

TitleOrientation-switching transition and ferroelectricity in betaine arsenate
Author(s)Ribeiro, J. L.
Dekola, T.
Vieira, L. G.
KeywordsPhase transitions
Dielectric relaxation
Vibrational spectroscopy
Issue date2009
PublisherIOP Publishing Ltd
JournalJournal of Physics: condensed matter
Abstract(s)This paper reports a detailed investigation of the low frequency dielectric relaxation of betaine arsenate near the ferroelectric phase transition. The dielectric relaxation data are complemented with polarized infrared reflectivity data taken at low temperatures. The reported results allow us to identify several low frequency modes that clarify the complex behaviour of the dielectric response near the Curie temperature Tc2 ≈ 120 K. It is suggested that the important slow dynamics observed is linked to the reorientation of the betaine molecular group. The roles of the different molecular units in the structural changes are briefly discussed and a new and more complex phase transition sequence is proposed
TypeArticle
URIhttp://hdl.handle.net/1822/14110
DOI10.1088/0953-8984/21/32/325901
ISSN0953-8984
1361-648X
Publisher versionhttp://dx.doi.org/10.1088/0953-8984/21/32/325901
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

Files in This Item:
File Description SizeFormat 
JPCM_21_325901(2009).pdf
  Restricted access
668,87 kBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID