Jpn. J. Appl. Phys. 43 (2004) pp. L647-L648 |Previous Article| |Next Article| |Table of Contents|
|Full Text PDF (87K)| |Buy This Article|
Giant Ferroelectric Polarization Beyond 150 µC/cm2 in BiFeO3 Thin Film
Division of Advanced Electronics and Optical Science, Department of System Innovation, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan
(Received March 16, 2004; accepted March 18, 2004; published April 16, 2004)
Ferroelectric BiFeO3 thin films have been deposited on Pt/TiO2/SiO2/Si substrate by pulsed-laser deposition. From the X-ray diffraction analysis, the BiFeO3 thin film consists of perovskite single-phase, and the crystal structure shows the tetragonal structure (c/a = 1.018) with a space group P4mm. It is obtained that the BiFeO3 thin film shows a well-saturated remarkably giant saturation polarization of 158 µC/cm2 and a remanent polarization of 146 µC/cm2 for a maximum applied voltage of 20 V at 90 K. These values of polarization are largest ever-measured in ferroelectrics.
- H. Miyazawa, E. Natori, T. Shimoda, H. Kishimoto, F. Ishii and T. Oguchi:
Jpn. J. Appl. Phys. 40 (2001) 5809[JSAP].
- S. Tinte, K. M. Rabe and D. Vanderbilt:
Phys. Rev. B 68 (2003) 144105[APS].
- J. Ìñiguez, D. Vanderbilt and L. Bellaiche:
Phys. Rev. B 67 (2003) 224107[APS].
- S. Yokoyama, Y. Honda, H. Morioka, T. Oikawa, H. Funakubo, T. Iijima, H. Matsuda and K. Saito:
Appl. Phys. Lett. 83 (2003) 2408[AIP Scitation].
- J. Wang, J. B. Neaton, H. Zheng, V. Nagarajan, S. B. Ogale, B. Liu, D. Viehland, V. Vaithyanathan, D. G. Schlom, U. V. Waghmare, N. A. Spaldin, K. M. Rabe, M. Wuttig and R. Ramesh: Science 299 (2003) 1719[Science].
- K. Y. Yun, M. Noda, M. Okuyama, H. Saeki, H. Tabata and K. Saito: submitted to J. Appl. Phys.
- K. Y. Yun, D. Ricinschi, M Noda and M. Okuyama: unpublished.