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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The giant $k_{31}$ and piezoelectric $d_{31}$ constant in Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMNT) single-crystal plates with dimensions of $13^{\text{L}}\times 4.0^{\text{W}}\times 0.34^{\text{T}}/0.47^{\text{T}}$ mm were investigated via the poling field dependence of the ferroelectric properties and by impedance response analysis on the $k_{31}$ mode. Giant $k_{31}$ over 86% was realized for (110) PMNT single-crystal plates under the conditions of a poling temperature of 40°C (pseudo-cubic phase), DC poling fields over 200 V/mm, and a poling time of 10 min. $P$–$E$ hysteresis loops in (110) PMNT plates with giant $k_{31}$ became asymmetric when the bipolar triangle pulse field exceeded 800 V/mm, which corresponds to the coercive field to obtain giant $k_{31}$. The frequency response of impedance in (110) PMNT plates with giant $k_{31}$ consisted of a single vibration in the length direction. Furthermore, since there were two frequency constants, 680 Hz-m on $k_{31}$ (length direction) mode and 1425 Hz-m on $k_{32}$ (width direction) mode, a single domain structure in the (110) PMNT single-crystal plate was confirmed by an anisotropy of their frequency constants. A mechanism to realize giant $k_{31}$ can be explained by the relationship between the crystal plane and poling direction. The existence of a giant $d_{31}$ constant was proven by the strain measurement as well as by the impedance measurement.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-09-15
著者
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Ogawa Toshio
Department Of Electronic Engineering Shizuoka Institute Of Science And Technology
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Iwasaki Yosuke
Functional Materials R&D Center, Research Laboratories, JFE Mineral Company Ltd., 1 Niihama-cho, Chuo-ku, Chiba-shi, Chiba 260-0826, Japan
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Matsushita Mitsuyoshi
Functional Materials R&D Center, Research Laboratories, JFE Mineral Company Ltd., 1 Niihama-cho, Chuo-ku, Chiba-shi, Chiba 260-0826, Japan
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Ogawa Toshio
Department of Electrical, Electronics and Information Engineering, Shizuoka Institute of Science and Technology, 2200-2 Toyosawa, Fukuroi-shi, 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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Matsushita Mitsuyoshi
Functional Materials R&D Center, Research Laboratories, JFE Mineral Company Ltd., 1 Niihama-cho, Chuo-ku, Chiba-shi, Chiba 260-0826, Japan
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Ogawa Toshio
Department of Chemistry, College of General Education, Nagoya University
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