X-Ray Study of the Surface Layer on Barium Titanate Single Crystal

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概要

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• The surface of the single crystal of BaTiO_3 was studied by X-ray diffraction method under a d.c. electric field. In the paraelectric phase, tetragonal surface layers are induced by the electric field. It is concluded that a large electric field exists in the surface part of the crystal whereas the interior part contributes to only a small potential drop. The migration of the negative charge is shown to play an important role for such a distribution of the electric field in the crystal. The thickness of the surface layer was determined to be 1.5×10^<-4> cm. Similar surface layer was observed in the ferroelectric phase. By taking the existence of the surface layer into account, an "actual" coercive field for the specimen of 0.32 mm thick used in the experimented to be about 1.2×10^5 V/cm, which is about 200 times as large as the usually reported value.

• 社団法人日本物理学会の論文
• 1972-01-05

著者

• Motegi Hiroshi

  The Institute For Solid State Physics The University Of Tokyo

関連論文

• A New Phase of Solid Hydrogen Chloride
• The Surface Layer in Barium Titanate
• X-Ray Study of the Surface Layer on Barium Titanate Single Crystal

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