Acoustic Imaging Frequency Dynamics of Ferroelectric Domains by Atomic Force Microscopy
Acoustic Imaging Frequency Dynamics of Ferroelectric Domains by Atomic Force Microscopy
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DOI：
10.1088/0256-307x/25/9/090
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发表时间：
2008-09
影响因子：
3.5
通讯作者：
Zhao Kunyu;Zeng Hua-Rong;Song Hong-Zhang;Hui Senxing;Li Guorong;Yin Qingrui;K. Shimamura;C. V. Kannan;E. Vı́llora;S. Takekawa;K. Kitamura
中科院分区：
文献类型：
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作者：
Zhao Kunyu;Zeng Hua-Rong;Song Hong-Zhang;Hui Senxing;Li Guorong;Yin Qingrui;K. Shimamura;C. V. Kannan;E. Vı́llora;S. Takekawa;K. Kitamura
在原子力显微镜（AFM）的基础上，利用低频声探针显微镜研究了铁电畴的声成像频率动力学。结果表明，AFM声显微镜首次在低至0.5kHz的低频下观察到铁电畴，在7 ~ 10 kHz的频率范围内有较强的声响应，在8.1kHz处达到最大值。声衬度的产生机理是由于压电换能器在交变电场作用下，由于正常的压电效应而激发出的声波在铁电微结构中传播，从而引起铁电微结构对局部弹性应力场的不同弹性响应。
We report the acoustic imaging frequency dynamics of ferroelectric domains by low-frequency acoustic probe microscopy based on the commercial atomic force microscopy It is found that ferroelectric domain could be firstly visualized at lower frequency down to 0.5 kHz by AFM-based acoustic microscopy The frequency-dependent acoustic signal revealed a strong acoustic response in the frequency range from 7kHz to 10kHz, and reached maximum at 8.1kHz. The acoustic contrast mechanism can be ascribed to the different elastic response of ferroelectric microstructures to local elastic stress fields, which is induced by the acoustic wave transmitting in the sample when the piezoelectric transducer is vibrating and exciting acoustic wave under ac electric fields due to normal piezoelectric effects.