中国物理B ›› 2019, Vol. 28 ›› Issue (12): 127702-127702.doi: 10.1088/1674-1056/ab4e85
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Depolarization field in relaxor-based ferroelectric single crystals under one-cycle bipolar pulse drive
Chuan-Wen Chen(陈传文), Yang Xiang(项阳), Li-Guo Tang(汤立国), Lian Cui(崔莲), Bao-Qing Lin(林宝卿), Wei-Dong Du(杜伟东), Wen-Wu Cao(曹文武)
- 1 Fujian Provincial Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China;
2 Department of Mathematics and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA;
3 Department of Applied Marine Physics&Engineering, Xiamen University, Xiamen 361010, China;
4 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;
5 School of Electronic and Information Engineering, Yangtze Normal University, Chongqing 408003, China;
6 Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
Depolarization field in relaxor-based ferroelectric single crystals under one-cycle bipolar pulse drive
Chuan-Wen Chen(陈传文)1,2, Yang Xiang(项阳)1, Li-Guo Tang(汤立国)3,4, Lian Cui(崔莲)2,5, Bao-Qing Lin(林宝卿)1, Wei-Dong Du(杜伟东)6, Wen-Wu Cao(曹文武)2
- 1 Fujian Provincial Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China;
2 Department of Mathematics and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA;
3 Department of Applied Marine Physics&Engineering, Xiamen University, Xiamen 361010, China;
4 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;
5 School of Electronic and Information Engineering, Yangtze Normal University, Chongqing 408003, China;
6 Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
摘要： The[001]c-polarized (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT) single crystals are widely used in ultrasonic detection transducers and underwater acoustic sensors. However, the relatively small coercive field (~2 kV/cm) of such crystals restricts their application at high frequencies because the driving field will exceed the coercive field. The depolarization field can be considerably larger in an antiparallel direction than in a parallel direction with respect to polarization when the bipolar driving cycle starts. Thus, if the direction of the sine wave signal in the first half cycle is opposite to the polarization direction, then the depolarized domains can be repolarized in the second half of the sine cycle. However, if the direction of the sine wave signal in the first half of the cycle is along the polarization direction, then the change is negligible, and the domains switched in the second half of the sine cycle cannot be recovered. The design of electric driving method needs to allow the use of a large applied field to emit strong enough signals and produce good images. This phenomenon combined with the coercive field increases with the driving frequency, thereby making the PMN-PT single crystals usable for high-frequency applications. As such, the applied field can be considerably larger than the conventionally defined coercive field.
中图分类号: (Polarization and depolarization)
- 77.22.Ej