Inferred Mechanism of the Phase Transformation of a Peculiar Ferroelectric-Ferroelastic Crystal : NaNH_4 Tartrate
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It is hypothesized that the transformation of NaNH_4 tartrate from the prototypic phase to the ferroelectric and ferroelastic phase is caused by instability of a pair of conjugate lattice vibration modes with the wave normal in the orthorhombic b direction and with the wave length equal to 3b. Then the strange dielectric anomaly of NaNH_4 tartrale which has been observed by jona et al. Takagi et al. is deduced naturally. Also, peculiar elastic and piezoelectric anomalies to be observed are deduced.
- 社団法人日本物理学会の論文
- 1971-11-05
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関連論文
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