Self-Consistent Anharmonic Theory and Its Application to the Isotope Effect on Ferroelectric Phase Transition in BaTiO3 Crystal
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概要
- 論文の詳細を見る
The isotope effect on ferroelectric phase transition is studied by the variational principle method using a self-consistent anharmonic model. A trial Hamiltonian was devised using the terms of the anharmonic oscillator and arbitrary potential energy between atoms. The isotope effects on BaTiO3 ferroelectric phase transition, especially on the cubic-to-tetragonal transition, are given through a function consisting of the optical phonon. It is revealed that a heavy-isotope-enriched crystal shows a lower $T_{\text{C}}$ than a light-isotope crystal, which is in agreement with the experimental Ti-isotope effects in BaTiO3.
- 2010-09-25
著者
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Aikawa Yutaka
Taiyo Yuden R&d Center
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Sakashita Tatsuo
Taiyo Yuden Research Institute, 5607-2 Nakamurodamachi, Takasaki, Gunma 370-3347, Japan
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SUZUKI Toshimasa
Taiyo Yuden Co Ltd, R&D Center
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Aikawa Yutaka
Taiyo Yuden Co., Ltd., Takasaki, Gunma 370-3347, Japan
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Aikawa Yutaka
Taiyo Yuden Research Institute, 5607-2 Nakamurodamachi, Takasaki, Gunma 370-3347, Japan
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