Small-Signal Permittivity of the Stationary (100)-180° Domain Wall in BaTiO_3

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概要

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• The small-signal permittivity of the (100)-type 180°domain wall in BaTiO_3 is calculated relative to the signal-domain permittivity according to a previously-reported microscopic model of 180° domain walls in BaTiO_3. A perturbation approach is developed which makes use of the known zero-field solutions of this domain wall and the single domain. It is found that the (100) domain-wall permittivity is about 61/2-times larger than the single-domain permittivity, and there are two reasons for this effect; First, the internal fields and polarizabilities of the ions in the wall region differ from the single-domain values; and second, the presence of a field lowers the domain-wall symmetry promoting the polarization of the Ba and O_b ions on the (100) domain-wall place. The dominant contribution to the enhanced domain-wall permittivity is the induced Ba and O_b polarizations.

• 社団法人日本物理学会の論文
• 1970-02-05

著者

• Lawless W.

  Research And Development Laboratories Corning Glass Works

• FOUSEK Jan

  Materials Research Laboratory, Pennsylvania State University

• Fousek Jan

  Materials Research Laboratory Pennsylvania State University:(present Address) Institute Of Physics C

• Lawless W.N.

  Research and Development Laboratories, Corning Glass Works

関連論文

• Small-Signal Permittivity of the Stationary (100)-180° Domain Wall in BaTiO_3

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