Changes in Ferroelectric Domain Structure with Electric Fatigue in Li0.06(Na0.5K0.5)0.94NbO3 Ceramics

被引：14

作者：

Tsurekawa, Sadahiro ^{[1
]}

Hatao, Hiroki ^{[1
]}

Takahashi, Hirofumi ^{[2
]}

Morizono, Yasuhiro ^{[1
]}

机构：

[1] Kumamoto Univ, Grad Sch Sci & Technol, Dept Mat Sci & Engn, Kumamoto 8608555, Japan

[2] Fuji Ceram Corp, Shizuoka 4180111, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2011年 / 50卷 / 09期

关键词：

FREE PIEZOELECTRIC CERAMICS; LEAD-ZIRCONATE-TITANATE; FORCE MICROSCOPY; SINGLE-CRYSTALS;

D O I：

10.1143/JJAP.50.09NC02

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Piezoelectric materials should have stable performance during electric cycling in service. Because piezoelectricity-related properties depend on the ferroelectric domain structure, it is essential to investigate the fatigue characteristics of domain structures under electric loading. Piezoresponse force microscopy (PFM) was used to observe changes in ferroelectric domain structure with cyclic electric loading in MnO2-doped Li-0.06(Na0.5K0.5)(0.94)NbO3 (LNKN) ceramics. The PFM observations revealed that polarization loss occurred owing to electric fatigue, and that domain width and length fraction of 180 degrees domain walls increased with increasing number of cycles. The decreases in the piezoelectric constant d(33) and the electromechanical coupling coefficient k(p) observed owing to electric fatigue are compared with fatigue of the domain structure. (C) 2011 The Japan Society of Applied Physics

引用

页数：4

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