Influence of KF substitution on electric field–temperature phase diagram in BaTiO

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概要

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• The electric field–temperature (E–T) phase diagram of Ba<inf>1−</inf><inf>x</inf>K<inf>x</inf>TiO<inf>3−</inf><inf>x</inf>F<inf>x</inf>(x = 0.027) was established to investigate the relationship between critical phenomena and enhanced piezoelectric and dielectric properties after KF substitution. By measuring the dielectric constant under an electric field, the critical end point (CEP) was determined to be E = 4 kV/cm and T = 380 K. E at the CEP is markedly less than that of BaTiO<inf>3</inf>, indicating that the electric fields necessary for large polarization fluctuations decrease owing to KF substitution. We suggest that the CEP line ends at a tricritical point located at x = 0.10, T ∼ 308 K, and E = 0 kV/cm in the x–E–T phase diagram.

• Institute of Physicsの論文
• 2014-09-03

著者

• Tsukada Shinya

  Faculty of Education, Shimane University, Matsue 690-8504, Japan

関連論文

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• Dielectric Dispersion in Ni-Doped KTaO3
• Influence of KF substitution on electric field–temperature phase diagram in BaTiO

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