Cation distribution and piezoelectric properties of aluminum substituted La3Ta0.5Ga5.5O14 single crystals
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概要
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We report the structure and electric properties of La3Ta0.5Ga5.5−xAlxO14 (LTGAx, x = 0.0 (LTG), 0.3 and 0.5) single crystals, with a Ca3Ga2Ge4O14-type structure, suitable for high temperature piezoelectric application. A single-crystal X-ray structure analysis reveals that Al atoms are distributed in all cation sites except for the decahedral site occupied by La, which favors instead the octahedral site. The piezoelectric moduli d11 kept a constant, whereas |d14| increased 14% with the increasing Al content, x, up to 0.5. The LTGA0.5 crystals showed a low temperature dependence (2% deviation from room temperature to 400°C) of d11 and a higher electric resistivity ρ than those of the LTG crystals. The Al substitution is effective for improving the electrical properties of the LTG.
著者
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YAMAURA Jun-Ichi
Institute for Solid State Physics, University of Tokyo
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Yamaura Jun-ichi
Inst. For Solid State Physics The Univ. Of Tokyo
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Yamaura Jun-ichi
Institute For Solid State Physics The University Of Tokyo
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TSURUMI Takaaki
Graduate School of Science and Engineering, Tokyo Institute of Technology
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Hoshina Takuya
The Graduate School Of Sci. And Engineering Tokyo Inst. Of Technol.
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HOSHINA Takuya
Graduate School of Science and Engineering, Tokyo Institute of Technology
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Takeda Hiroaki
Graduate School of Science and Technology, Tokyo Institute of Technology
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Hoshina Takuya
Graduate School Of Science And Engineering Tokyo Institute Of Technology
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Hoshina Takuya
Department Of Metallurgy And Ceramics Science Tokyo Institute Of Technology
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Tsurumi Takaaki
Graduate School Of Science And Engineering Tokyo Institute Of Technology
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Takeda Hiroaki
Graduate School Of Materials Science Nara Institute Of Science And Technology (naist)
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YAMAURA Jun-ichi
Institute for Solid State Physics, The University of Tokyo
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TSURUMI Takaaki
Graduate School of Science and Technology, Tokyo Institute of Technology
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Takeda Hiroaki
Graduate School of Material Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan
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HOSHINA Takuya
Graduate School of Science and Technology, Tokyo Institute of Technology
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Tsurumi Takaaki
Graduate School of Materials Science and Technology, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan
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