Switchable Ferroelectric Diode Effect and Piezoelectric Properties of Bi0.9La0.1FeO3 Ceramics
GONG Yu-Fei1,WU Ping1,LIU Wei-Fang1**,WANG Shou-Yu2,LIU Guang-Yao3,RAO Guang-Hui4
1Department of Applied Physics, Institute of Advanced Materials Physics, Tianjin Key Laboratory of Low-Dimensional Materials Physics and Preparing Technology, Faculty of Science, Tianjin University, Tianjin 300072 2College of Physics and Electronic Information Science, Tianjin Normal University, Tianjin 300387 3Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 4Department of Information Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004
Switchable Ferroelectric Diode Effect and Piezoelectric Properties of Bi0.9La0.1FeO3 Ceramics
GONG Yu-Fei1,WU Ping1,LIU Wei-Fang1**,WANG Shou-Yu2,LIU Guang-Yao3,RAO Guang-Hui4
1Department of Applied Physics, Institute of Advanced Materials Physics, Tianjin Key Laboratory of Low-Dimensional Materials Physics and Preparing Technology, Faculty of Science, Tianjin University, Tianjin 300072 2College of Physics and Electronic Information Science, Tianjin Normal University, Tianjin 300387 3Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 4Department of Information Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004
摘要Multiferroic ceramics Bi0.9La0.1FeO3 are synthesized by solid−state reactions and sintered at various temperatures. The rhombohedral structure with the space group R3c is confirmed by means of x−ray diffraction, and their multiferroic properties are investigated. Bi0.9La0.1FeO3 ceramics sintered at 880°C are found to have the lowest leakage current density and the largest saturated polarization among all the samples. A diode−like current-voltage hysteresis that could be switched by an external voltage is observed in the Bi0.9La0.1FeO3 ceramics. A typical "butterfly" shaped strain−versus-voltage curve is shown with a maximum strain of 0.09% at 7 kV. Room-temperature magnetization exhibits a hysteresis loop, indicating that the modulation of the spin structure of BiFeO3 has been suppressed.
Abstract：Multiferroic ceramics Bi0.9La0.1FeO3 are synthesized by solid−state reactions and sintered at various temperatures. The rhombohedral structure with the space group R3c is confirmed by means of x−ray diffraction, and their multiferroic properties are investigated. Bi0.9La0.1FeO3 ceramics sintered at 880°C are found to have the lowest leakage current density and the largest saturated polarization among all the samples. A diode−like current-voltage hysteresis that could be switched by an external voltage is observed in the Bi0.9La0.1FeO3 ceramics. A typical "butterfly" shaped strain−versus-voltage curve is shown with a maximum strain of 0.09% at 7 kV. Room-temperature magnetization exhibits a hysteresis loop, indicating that the modulation of the spin structure of BiFeO3 has been suppressed.
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