Giant Dielectric Response of Oxygen-Deficient Hexagonal BaTiO3 Single Crystals Prepared by a Pressurized Electrostatic Levitation Furnace

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  • MASUNO Atsunobu
    Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science, ISS Science Project 0ffice
  • YU Jianding
    Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science, ISS Science Project 0ffice
  • ISHIKAWA Takehiko
    Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science, ISS Science Project 0ffice

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Other Title
  • 加圧型静電浮遊炉で作製した酸素欠損六方晶BaTi03 単結晶における巨大誘電応答
  • 加圧型静電浮遊炉で作製した酸素欠損六方晶BaTiO3単結晶における巨大誘電応答
  • カアツガタ セイデン フユウロ デ サクセイシタ サンソ ケッソン ロッポウショウ BaTiO3 タンケッショウ ニ オケル キョダイ ユウデン オウトウ

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Abstract

Oxygen-deficient hexagonal BaTiO3 single crystals were grown by a pressurized electrostatic levitation furnace. The hexagonal BaTiO3 exhibited a giant dielectric constant (ε’) at room temperature and a weak temperature dependence of ε’ in the range from 70 K to 300 K. Annealing the hexagonal BaTiO3 in air atmosphere in order to control the amount of the oxygen deficiencies improved the dielectric properties. These results suggest that the oxygen-deficient hexagonal BaTiO3 is expected as a candidate for technological application.

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