Alternating electric force microscopy: Static electric field gradient imaging in an air atmosphere for Ba0.7Sr0.3TiO3 ferroelectric thin film
Alternating electric force microscopy: Static electric field gradient imaging in an air atmosphere for Ba0.7Sr0.3TiO3 ferroelectric thin film
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DOI：
10.1063/1.4770447
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发表时间：
2012-12
影响因子：
3.2
通讯作者：
Jia Lu;Y. Kinoshita;G. Egawa;S. Yoshimura;H. Asano;H. Saito
中科院分区：
文献类型：
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作者：
Jia Lu;Y. Kinoshita;G. Egawa;S. Yoshimura;H. Asano;H. Saito
提出了一种交流电场显微镜(A-EFM)技术，该技术可以有效地成像大气中的静电场梯度。A-EFM使用机械振荡导电尖端的频率调制，这是通过向尖端施加非共振交流电压来感应的。交流电压在尖端产生非共振交变电力。A-EFM利用锁定检测技术，在不涉及表面力的情况下，从样品中检测具有场极性的静电场梯度。对于Ba0.7Sr0.3TiO_3铁电薄膜，A-EFM清晰地成像了空气气氛中的静电场梯度随场的极性和电畴的边界。
An alternating electric force microscopy (A-EFM) technique, which is effective for the imaging of static electric field gradient in an air atmosphere, is proposed by using our developed alternating force microscopy. A-EFM uses a frequency modulation of a mechanically oscillating conductive tip, which is induced by applying off-resonant AC voltage to the tip. The AC voltage generates off-resonant alternating electric force at the tip. A-EFM detects static electric field gradient with the field polarity from a sample without involving surface forces by using a lock-in detection technique. For a Ba0.7Sr0.3TiO3 ferroelectric thin film, A-EFM clearly imaged the static electric field gradient with field polarity and the boundary of electric domain in an air atmosphere.