書誌事項

タイトル別名
  • Elastic and Dielectric Properties of LiNbO<SUB>3</SUB>
  • Elastic and Dielectric Properties of Li
公開日
1987
DOI
  • 10.1143/jpsj.56.163
公開者
一般社団法人 日本物理学会

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説明

Elastic constants C11, C33, C44, and C66, and dielectric susceptibilities χ11 and χ33 in LiNbO3, were determined over the temperature range from 300 to above 1030 K. The elastic-constant difference between constant polarization and constant field CiiPCiiE, and the inverse-susceptibility difference between constant strain and constant stress (χiix)−1−(χiiX)−1 are interpreted in terms of both electrostrictive and higher-order interaction between strain and polarization. The results for χ33 indicate that LiNbO3 undergoes nearly second-order phase transition at TC=1410 K. Above TC, χ33 showed dispersion in the frequency range between 1 and 13 MHz. A comparison of these results with soft-mode frequency implies that the soft mode couples with a low frequency relaxation process near TC.

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