Vibrational and Dielectric Properties of MnO2-doped Bismuth Layered-Structure Ferroelectrics

Author

Islam, M.S. ; Kano, J. ; Yin, Q.R. ; Kojima, S.

Author_Institution

Tsukuba Univ., Tsukuba

fYear

2007

fDate

27-31 May 2007

Firstpage

478

Lastpage

480

Abstract

The MnO₂ doping effect on ferroelectric phase transitions of CaBi₄Ti₄O₁₅ ceramics has been studied by Raman scattering, dielectric measurements and scanning electron microscope. The Curie temperatures show monotonic decrease as the content of MnO₂ increases. Softeing of low frequency optical modes has been observed for all the compositions, while the Raman scattering decreases markedly as the content of MnO₂ increases.

Keywords

Raman spectra; bismuth compounds; calcium compounds; dielectric losses; dielectric measurement; doping profiles; ferroelectric Curie temperature; ferroelectric ceramics; ferroelectric thin films; ferroelectric transitions; manganese compounds; permittivity; phonons; piezoceramics; scanning electron microscopy; soft modes; CaBi₄Ti₄O₁₅:MnO₂; Curie temperatures; Raman scattering; bismuth layered-structure ferroelectrics; ceramics; dielectric constants; dielectric loss; dielectric measurements; dielectric properties; doping effect; ferroelectric phase transitions; low frequency optical mode softening; piezoelectric ceramics; piezoelectric coefficient; scanning electron microscopy; vibrational properties; Ceramics; Dielectric measurements; Doping; Electron optics; Ferroelectric materials; Frequency; Optical scattering; Raman scattering; Scanning electron microscopy; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on

Conference_Location

Nara

ISSN

1099-4734

Print_ISBN

978-1-4244-1334-8

Electronic_ISBN

1099-4734

Type

conf

DOI

10.1109/ISAF.2007.4393304

Filename

4393304