Title :
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
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;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393304
