Composition dependence of xBiFeO3-(1-x)PbTiO3 films prepared by sol-gel technique

Author

Yuan, Bingrong ; Yu, Shengwen ; Yang, Wufeng ; Zhou, Xiaowen ; Cheng, Jinrong

Author_Institution

Sch. of Mater. Sci. & Eng., Shanghai Univ., Shanghai, China

fYear

2009

fDate

23-27 Aug. 2009

Firstpage

1

Lastpage

4

Abstract

Bismuth ferrite and lead titanate composite multiferroic films (xBiFeO₃-(1-x)PbTiO₃, BFO-PT films) were deposited on Pt/Ti/SiO₂/Si substrates by sol-gel method. In this report, the value of x varies from 0.5 to 0.8. The composition dependence (dependence of x) of BFO-PT films is studied. X-ray diffraction analysis reveals that all films are well crystallized in tetragonal phase. It discovers that enhanced ferroelectricity and decreased coercive field can be obtained by reducing the content of BFO (decreasing x). Film for x=0.7 shows the optimized properties, with a very low leakage density about 3.3 times 10^-7 A/cm² at 100 kV/cm, maintaining the values of remanent polarization of 35.5 muC/cm² and coercive field of 165 kV/cm at 680 kv/cm at room temperature.

Keywords

X-ray diffraction; bismuth compounds; dielectric polarisation; ferroelectric coercive field; ferroelectric thin films; lead compounds; multiferroics; sol-gel processing; BiFeO₃-PbTiO₃; Pt-Ti-SiO₂-Si; Si; X-ray diffraction analysis; bismuth ferrite; coercive field; ferroelectricity; lead titanate composite multiferroic films; leakage density; remanent polarization; sol-gel technique; temperature 293 K to 298 K; tetragonal phase; Bismuth; Crystallization; Ferrite films; Ferroelectric films; Polarization; Semiconductor films; Substrates; Temperature; Titanium compounds; X-ray diffraction;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2009. ISAF 2009. 18th IEEE International Symposium on the

Conference_Location

Xian

ISSN

1099-4734

Print_ISBN

978-1-4244-4970-5

Electronic_ISBN

1099-4734

Type

conf

DOI

10.1109/ISAF.2009.5307556

Filename

5307556