Title :
Ferroelectric Properties of Mn-substituted BiFeO3 Thin Film on Ir Electrodes
Author :
Zhong, Z.Y. ; Singh, S.K. ; Maruyama, K. ; Ishiwara, H.
Author_Institution :
Tokyo Inst. of Technol., Yokohama
Abstract :
In this study, ferroelectric properties and fatigue endurance of 5% Mn-substituted BiFeO3 (BFO) films deposited on Iridium (Ir) and Platinum (Pt) electrodes were discussed. 5% Mn-substituted BFO thin films were formed on Ir(Pt)/Ti/SiO2/Si(100) substrates by chemical solution deposition (CSD). XRD patterns proved that BFO films on both Ir and Pt electrodes have distorted rhombohedral R3c structure. Leakage current in BFO films on Ir electrode increased because of the lower Schottky barrier height than Pt. Remanent polarization (Pr) and coercive electric field in BFO films on Ir electrode were 82 muC/cm2 and 0.4 MV/cm respectively at an applied electric field of 2.2MV/cm and a measurement frequency of 10 kHz. In the fatigue endurance measurement in a BFO film on Ir electrode degradation of Pr (55 muC/cm2) was negligible up to 4.7times106 polarization reversal cycles.
Keywords :
Schottky barriers; X-ray diffraction; bismuth compounds; dielectric polarisation; electrodes; ferroelectric thin films; leakage currents; liquid phase deposition; BiFeO3; Ir; Mn-substituted BFO thin film; Pt; Schottky barrier height; XRD patterns; chemical solution deposition; coercive electric field; distorted rhombohedral R3c structure; fatigue endurance; ferroelectric properties; frequency 10 kHz; iridium electrodes; leakage current; platinum electrodes; remanent polarization; Chemicals; Electrodes; Fatigue; Ferroelectric films; Ferroelectric materials; Platinum; Polarization; Sputtering; Substrates; X-ray scattering;
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.2007.4393270
