Preparation and Characterization of Bi-Layer-Structured Multiferroic Bi5Ti3FeO15 Thin Films Prepared by Pulsed Laser Deposition

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概要

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• Bi-layer-structured multiferroic Bi5Ti3FeO15 (BTFO15) thin films have been fabricated on the Pt/TiO2/SiO2/Si substrate at a low temperature of ${\sim}520$ °C and various O2 pressures of 0.01–0.12 Torr by pulsed laser deposition, and their dielectric, ferroelectric, and magnetic properties have been characterized. The X-ray diffraction patterns of the BTFO15 thin films indicate the mixed phases of Bi5Ti3FeO15 and pyrochlore Bi2Ti2O7. The BTFO15 thin films (520 °C and 0.12 Torr) show a good ferroelectric hysteresis loop, and a large double remanent polarization ($2P_{\text{r}}$) of 32 μC/cm2 was obtained at a maximum applied electric field of 1120 kV/cm (40 V) despite the coexistence of the Bi5Ti3FeO15 and pyrochlore Bi2Ti2O7 phases. The magnetic $M$–$H$ hysteresis measurement shows that a weak ferromagnetic characteristic was also obtained.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2007-10-30

著者

• Yun Kwi-Young

  Division of Advanced Electronics and Optical Science, Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan

• Okuyama Masanori

  Division of Advanced Electronics and Optical Science, Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan

• Okuyama Masanori

  Division of Advanced Electrics and Optical Science, Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan

• Nakashima Seiji

  Division of Advanced Electronics and Optical Science, Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan

• Nakashima Seiji

  Division of Advanced Electrics and Optical Science, Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan

• Nakamura Yoshitaka

  Division of Advanced Electronics and Optical Science, Department of Systems Innovation, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan

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