Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/17929

TitleBarium titanate thin films deposited by electrophoresis on p-doped si(001) substrates
Author(s)Barbosa, José Gusman
Pereira, Mário R.
Moura, C.
Mendes, J. A.
Almeida, B. G.
KeywordsBarium
Titanate
Solgel
Electrophoresis
Barium Titanate Films
Electrophoretic Deposition
Annealing
Raman Spectroscopy
Dielectric Properties
Issue dateOct-2011
PublisherAmerican Scientific Publishers
JournalJournal of Nanoscience and Nanotechnology
Abstract(s)Barium titanate (BaTiO3) thin films have been prepared by electrophoretic deposition on p-doped and platinum covered silicon (Si) substrates. Their structure, nanostructure and dielectric properties were characterized. The as-deposited films were polycrystalline and composed by barium titanate nanograins with an average grain size ~9 nm. Annealing at high temperatures promoted grain growth, so that the samples annealed at 600 ºC presented average grain sizes ~24 nm. From Raman spectroscopy measurements it was found that the tetragonal (ferroelectric) BaTiO3 phase was stabilized on the films. Also, at higher annealing temperatures, cation disorder was reduced on the films. From measurements of the temperature dependence of the dielectric permittivity the corresponding paraelectric-ferroelectric phase transition was determined. The observed transition temperature (~100ºC) was found to be below the BaTiO3 bulk or thick film values, due to the small nanosized grains composing the films.
TypeArticle
URIhttp://hdl.handle.net/1822/17929
DOI10.1166/jnn.2011.3494
ISSN1533-4880
Publisher versionhttp://www.ingentaconnect.com/
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDF - FAMO - Artigos/Papers (with refereeing)

Files in This Item:
File Description SizeFormat 
NS233 final.pdf
  Restricted access
Documento principal321,38 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