| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Piezoelectric and electro—optic properties of tetragonal (1-x)Pb(Mg1/3Nb2/3)O3—xPbTiO3 single crystals by phenomenological theory |
| Qiu Jian-Hua (邱建华), Wang Xiu-Qin (王秀琴), Yuan Ning-Yi (袁宁一), Ding Jian-Ning (丁建宁) |
| Center for Low-dimensional Materials, Micro-nano Devices and System, Changzhou University, Changzhou 213164, China |
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Abstract An eighth-order Landau–Devonshire theory is constructed to investigate the piezoelectric and electro–optic properties of tetragonal (1-x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 single crystals (x=0.38 and x=0.4). The dielectric stiffness coefficients of the Landau potential are obtained by fitting to the dielectric properties and the phase transition temperature between cubic phase and tetragonal phase. It is indicated that tetragonal (1-x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 single crystals have the first-order cubic-tetragonal phase transitions. The dielectric constants are in great agreement with the experimental results. The piezoelectric coefficients d33 and d31 at room temperature are about 145 pC/N and -62 pC/N respectively which are smaller than that of (1-x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 single crystals around the morphotropic phase boundary. Moreover, tetragonal (1-x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 single crystals have the linear electro–optic coefficients rc=33.7 pm/V and rc=28.8 pm/V for x=0.38 and x=0.4, respectively which are in accordance with the measurements.
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Received: 13 January 2015
Revised: 10 February 2015
Accepted manuscript online:
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PACS:
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77.22.-d
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(Dielectric properties of solids and liquids)
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77.65.Bn
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(Piezoelectric and electrostrictive constants)
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78.20.Jq
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(Electro-optical effects)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51335002), the Changzhou Science and Technology Project, China (Grant No. CJ20130022), and the Priority Academic Program Development of Jiangsu Higher Education Institutions, China. |
Corresponding Authors:
Qiu Jian-Hua, Ding Jian-Ning
E-mail: jhqiu@cczu.edu.cn;dingjn@cczu.edu.cn
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Cite this article:
Qiu Jian-Hua (邱建华), Wang Xiu-Qin (王秀琴), Yuan Ning-Yi (袁宁一), Ding Jian-Ning (丁建宁) Piezoelectric and electro—optic properties of tetragonal (1-x)Pb(Mg1/3Nb2/3)O3—xPbTiO3 single crystals by phenomenological theory 2015 Chin. Phys. B 24 077701
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