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Surface potential imaging of nanoscale LiNbO3 domains investigated by electrostatic force microscopy

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3 Author(s)
Liu, Xiaoyan ; National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan and Interdisciplinary, Graduate School of Engineering Sciences, Kyushu University, 6-1, Kasuga-Koen, Kasuga 816-8580, Japan ; Kitamura, Kenji ; Terabe, Kazuya

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The surface potential imaging of nanoscale domains engineered on near-stoichiometric LiNbO3 (SLN) crystals was investigated using Kelvin probe-based, electrostatic force microscopy. The surface potential image reflected in the domain structure was clearly obtained using heat treatment in vacuum due to the decreases in spontaneous polarization and screening charge adsorption. In-vacuum observation revealed that the surface potential contrast and polarity of nanoscale engineered domains can be repeatedly changed by switching the temperature between 298 and 393 K, demonstrating the controllability of the spontaneous polarization distribution in SLN crystals.

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Applied Physics Letters  (Volume:89 ,  Issue: 13 )