A-4 表面電極対で分極処理したPMN-PT結晶の分域組織(超音波物性・材料、フォノン)

概要

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PMN-PT has a dramatically large piezoelectricity. This piezoelectric behavior is fundamentally controlled by the ferroelectric domains called engineered domain structures. A surface electrode pair with 10 μm gap was fabricated on PMN-PT in order to apply electric field in observation plane of AFM. Domain structure was evaluated by ultrasonic atomic force microscopy (UAFM) and lateral piezoresponse force microscopy (LPFM). In UAFM, resonance frequency decreased on domain boundaries imaged by LPFM, due to the reduction of contact stiffness. Moreover, subsurface domain boundary tilted with respect to the observation plane was observed, although it was not imaged by LPFM. As a result of applying electric field, switching with motions of domain boundaries was observed. A surface electrode pair is useful to evaluate domain behavior in ferroelectrics.
超音波エレクトロニクスの基礎と応用に関するシンポジウム運営委員会の論文
2006-11-15