Materials Transactions Online

Materials Transactions, Vol.53 No.04 (2012) pp.696-699
© 2012 The Japan Institute of Metals

Observation of Electric Potential Distribution in Model Capacitor Sample Using Electron Holography

Ryuichi Kuramae1, Hiroyuki Ono2, Yoshinori Fujikawa2, Yasukazu Murakami1 and Daisuke Shindo1

1Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
2TDK Corporation, Narita 286-8588, Japan

The electrical potential distribution in a model capacitor specimen, made of single-crystalline BaTiO3 and thin Pt plates, has been revealed by electron holography. In order to represent the inherent potential distribution related to the capacitance, undesired phase information was eliminated by the analysis of electron holograms acquired in various conditions of applied voltage; the undesired information includes signals due to electrical charging, thickness variation, and modulation of the reference electron wave by a long-range electric field. The observation of electric potential showed reasonable agreement with simulation for the model specimen.

(Received 2011/11/25; Accepted 2011/12/22; Published 2012/03/25)

Keywords: electron holography, electric potential, capacitor, barium titanate

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