Dependence of the Crystal Structure on Particle Size in Barium Titanate |
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| Authors: | Kenji Uchino Eiji Sadanaga Terukiyo Hirose |
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| Affiliation: | Department of Physics, Sophia University, Kioi-cho 7-1, Chiyoda-ku, Tokyo 102, Japan, and Titan Kogyo Kabushiki Kaisha, Oaza Ogushi 1978, Ube-shi, Yamaguchi 755, Japan |
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| Abstract: | The effect of the sample particle size on the crystal structure and the Curie temperature of BaTiO3 powder has been investigated in the particle size range 0.1 to 1.0 μm. The transformation from tetragonal to cubic symmetry occurs at a critical particle size of 0.12 μm at room temperature, and the Curie temperature drops below room temperature at the critical particle size. |
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| Keywords: | barium titanate crystal structure particle size phonons Curie temperature |
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