Title :
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
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;
Conference_Titel :
Applications of Ferroelectrics, 2009. ISAF 2009. 18th IEEE International Symposium on the
Conference_Location :
Xian
Print_ISBN :
978-1-4244-4970-5
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2009.5307556
