Simulation of Material Properties of Barium Titanate Single Crystal with Multidomain Structure Using Modified Time-Dependent Devonshire--Ginzburg--Landau Model

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概要

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• We simulated and compared the material properties of the tetragonal phase of barium titanate for two types of multidomain structures, namely, multidomain-1 including both 90 and 180° domains, and multidomain-2 including only the 180° domain, and a monodomain by using a modified time-dependent Devonshire--Ginzburg--Landau model of two dimensions. We found that the piezoelectric coefficient d_{12} and dielectric susceptibility \eta_{22} of muiltidomain-1 are about 6.5 times larger than those of the monodomain, and the large values of d_{12} and \eta_{22} of multidomain-1 are explained by considering its peculiar multidomain structure. Moreover, we found that the piezoelectric coefficient d_{22} of muiltidomain-2 before polling is about one-half that of the monodomain, and that of muiltidomain-2 after polling is about two times larger than that before polling, whereas the value of \eta_{22} before polling is three times larger than that after polling.

• 2012-05-25

著者

• Miura Kaoru

  Nanomaterials Development Department 32, Nanomaterials Technology Development Center, Corporate R&D Headquarters, CANON, Inc., Ota, Tokyo 146-8501, Japan

• Imanaga Syunji

  Nanomaterials Development Department 32, Nanomaterials Technology Development Center, Corporate R&D Headquarters, CANON, Inc., Ota, Tokyo 146-8501, Japan

関連論文

• Simulation of Material Properties of Barium Titanate Single Crystal with Multidomain Structure Using Modified Time-Dependent Devonshire--Ginzburg--Landau Model

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