Effects of Manganese Oxides/Gold Composite Electrode on Piezoelectric Properties of Lead Magnesium Niobate Titanate Single Crystal

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概要

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• We have confirmed a high dielectric constant after poling $\varepsilon_{33}{}^{\text{T}}/\varepsilon_{0}$ of 7700 and piezoelectric constant $d_{33} = 2250$ pC/N, which are 40% larger than those of the initial sample, for a lead magnesium niobate--lead titanate 0.72 Pb(Mg_1/3Nb_2/3)O₃--0.28 PbTiO₃ single crystal plate with a manganese oxide/gold (Au) composite electrode. The increased $\varepsilon_{33}{}^{\text{T}}/\varepsilon_{0}$ and $d_{33}$ may be attributable to the smaller domains realized by fine patterning semiconductor manganese oxide and conductive Au composite electrodes on the single crystal plate. The use of a semiconductor/conductor composite electrode is an effective method of improving the properties of piezoelectric single-crystal transducers.

• 2011-09-25

著者

• Hosono Yasuharu

  Corporate R&d Center Toshiba Corp.

• Itsumi Kazuhiro

  Corporate Research & Development Center Toshiba Corp.

• Yamamoto Noriko

  Corporate Research and Development Center, Toshiba Corporation, 1 Komukai-Toshiba-cho, Saiwai-ku, Kawasaki 212-8582, Japan

• Yamashita Yohachi

  Toshiba Corporate R&D Center, Toshiba Corporation, Kawasaki 212-8582, Japan

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