Chemical Composition Dependence of Giant Piezoelectricity on $k_{31}$ Mode in Pb(Mg1/3Nb2/3)O3–PbTiO3 Single Crystals
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概要
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Giant $k_{31}$ in ($1-x$)Pb(Mg1/3Nb2/3)O3–$x$PbTiO3 ($x=0.251--0.301$) (PMNT) (110) single-crystal plates with dimensions of $13^{\text{L}}\times 4.0^{\text{W}}\times 0.25^{\text{T}}$ mm3 was investigated by the chemical composition dependence of ferroelectric properties, impedance response on the $k_{31}$ mode, $P$–$E$ hysteresis loop and electric-field induced strain. The Ti composition ($x$) dependence of the relative dielectric constant after poling, and the dependence of $k_{31}$ and the frequency constant of $k_{31}$ mode versus $x$ consisted of four groups. Giant $k_{31}$ of more than 80% was obtained for $x=0.251--0.293$, and the maximum $k_{31}$ reached 92% ($x=0.291$). The frequency response of impedance in (110) PMNT single-crystal plates with giant $k_{31}$ was composed of a single vibration in the length direction. The $P$–$E$ hysteresis loops became asymmetrical in the case of (110) PMNT plates with giant $k_{31}$. In addition, the relationship between shrinkage-strain in the length direction and a unipolar triangle pulse field applied in the poling direction showed a typical relaxor-type hysteresis in the plates with giant $k_{31}$. A mechanism for realizing giant $k_{31}$ was explained by the relationships between the crystal planes, which strongly affect the direction of the spontaneous polarization and poling direction. Furthermore, it was found that there were different crystal structures after poling in the plates with giant $k_{31}$.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-09-30
著者
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Sugiyama Daisuke
Department Of Chemistry Faculty Of Science And Engineering Saga University
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Ogawa Toshio
Department of Electrical, Electronics and Information Engineering, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka 437-8555, Japan
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Ogawa Toshio
Department of Electrical and Electronic Engineering, Faculty of Science and Technology, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka 437-8555, Japan
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Kato Rakuko
Department of Electrical, Electronics and Information Engineering, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka 437-8555, Japan
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Kayukawa Kousaku
Department of Electrical, Electronics and Information Engineering, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka 437-8555, Japan
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Sugiyama Daisuke
Department of Electrical, Electronics and Information Engineering, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi, Shizuoka 437-8555, Japan
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Ogawa Toshio
Department of Chemistry, College of General Education, Nagoya University
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