Force Constants in BaTiO_3 and SrTiO_3
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概要
- 論文の詳細を見る
Two possible sets of force constants in BaTiO^3 are obtained using the reported experimental data on atomic displacements in soft mode and frequencies of other optical branches. The anharmonicity is implicitly taken into account as the temperature dependence of some force constants. It is confirmed that the cancellation with each other of long range and short range parts in the force constant k_4 for Ti-O_I bond, with nonzero force constant k_1 for Ti-Ba bond, is an essential origin of the lattice instability. Temperature dependence of the force constant k_4 is also discussed.
- 社団法人日本物理学会の論文
- 1971-12-05
著者
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Takagi Yutaka
Synthetic Crystal Research Laboratory Faculty Of Engineering Nagaya University
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Takagi Yutaka
Synthetic Crystal Researh Laboratory Faculty Of Engineering Nagoya University
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Ishibashi Yoshihiro
Synthehic Crystal Reseach Laboratory Faculty Of Engineering Nagoya University
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Ishibashi Yoshihiro
Synthetic Crystal Researh Laboratory Faculty Of Engineering Nagoya University
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