Origin of the enhanced polarization in La and Mg co-substituted BiFeO3 thin film during the fatigue process
-
- Qingqing Ke
- Department of Materials Science and Engineering, National University of Singapore 1 , Singapore 117574
-
- Amit Kumar
- Department of Mechanical Engineering, National University of Singapore 2 , Singapore 117576
-
- Xiaojie Lou
- Frontier Institute of Science and Techology, Xi'an Jiaotong University 3 , Xi'an 710049, China
-
- Kaiyang Zeng
- Department of Mechanical Engineering, National University of Singapore 2 , Singapore 117576
-
- John Wang
- Department of Materials Science and Engineering, National University of Singapore 1 , Singapore 117574
書誌事項
- 公開日
- 2012-01-23
- DOI
-
- 10.1063/1.3678636
- 公開者
- AIP Publishing
この論文をさがす
説明
<jats:p>We have studied the polarization fatigue of La and Mg co-substituted BiFeO3 thin film, where a polarization peak is observed during the fatigue process. The origin of such anomalous behavior is analyzed on the basis of the defect evolution using temperature-dependent impedance spectroscopy. It shows that the motion of oxygen vacancies (VO••) is associated with a lower energy barrier, accompanied by the injection of electrons into the film during the fatigue process. A qualitative model is proposed to explain the fatigue behavior, which involves the modification of the Schottky barrier upon the accumulation of VO•• at the metal-dielectric interface.</jats:p>
収録刊行物
-
- Applied Physics Letters
-
Applied Physics Letters 100 (4), 042902-, 2012-01-23
AIP Publishing