Evaluation of Domain Boundary of Piezo/Ferroelectric Material by Ultrasonic Atomic Force Microscopy
Evaluation of Domain Boundary of Piezo/Ferroelectric Material by Ultrasonic Atomic Force Microscopy
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DOI：
10.1143/jjap.43.2907
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发表时间：
2004-05
影响因子：
1.5
通讯作者：
T. Tsuji;H. Ogiso;J. Akedo;S. Saito;K. Fukuda;K. Yamanaka
中科院分区：
文献类型：
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作者：
T. Tsuji;H. Ogiso;J. Akedo;S. Saito;K. Fukuda;K. Yamanaka
采用超声原子力显微镜（UAFM）研究了锆钛酸铅（PZT）在畴边界（DB）上的弹性变化。UAFM不仅对颗粒之间的接触刚度变化进行了成像，而且对DB也进行了成像。根据分析，DB的接触刚度比域内的接触刚度低约10%。这是由DB引起的弹性变化的第一个直接证据。这一发现的含义是，DB处的低刚度可能会影响PZT的压电性和DB在应力和电场下的易迁移性，这不仅对执行器应用很重要，而且对高速写入存储器应用也很重要。
Ultrasonic atomic force microscopy (UAFM) was used to investigate the elasticity variation on domain boundary (DB) in lead zirconate titanate (PZT). The UAFM imaged the change in contact stiffness not only among grains but also on the DB. According to an analysis, the contact stiffness of the DB was approximately 10% lower than that within the domain. This is the first direct evidence of the variation of the elasticity due to the DB. The implication of this finding is that the low stiffness at the DB may affect the piezoelectricity of PZT and the easy mobility of the DB under a stress and electric field, which are important for not only actuator applications but also high-speed writing memory applications.