中国物理B ›› 2015, Vol. 24 ›› Issue (7): 77701-077701.doi: 10.1088/1674-1056/24/7/077701

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Piezoelectric and electro—optic properties of tetragonal (1-x)Pb(Mg1/3Nb2/3)O3xPbTiO3 single crystals by phenomenological theory

邱建华, 王秀琴, 袁宁一, 丁建宁   

  1. Center for Low-dimensional Materials, Micro-nano Devices and System, Changzhou University, Changzhou 213164, China
  • 收稿日期:2015-01-13 修回日期:2015-02-10 出版日期:2015-07-05 发布日期:2015-07-05
  • 基金资助:

    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.

Piezoelectric and electro—optic properties of tetragonal (1-x)Pb(Mg1/3Nb2/3)O3xPbTiO3 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)   

  1. Center for Low-dimensional Materials, Micro-nano Devices and System, Changzhou University, Changzhou 213164, China
  • Received:2015-01-13 Revised:2015-02-10 Online:2015-07-05 Published:2015-07-05
  • Contact: Qiu Jian-Hua, Ding Jian-Ning E-mail:jhqiu@cczu.edu.cn;dingjn@cczu.edu.cn
  • Supported by:

    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.

摘要:

An eighth-order Landau–Devonshire theory is constructed to investigate the piezoelectric and electro–optic properties of tetragonal (1-x)Pb(Mg1/3Nb2/3)O3xPbTiO3 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)O3xPbTiO3 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)O3xPbTiO3 single crystals around the morphotropic phase boundary. Moreover, tetragonal (1-x)Pb(Mg1/3Nb2/3)O3xPbTiO3 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.

关键词: dielectric property, piezoelectric property, electrooptic effect

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)O3xPbTiO3 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)O3xPbTiO3 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)O3xPbTiO3 single crystals around the morphotropic phase boundary. Moreover, tetragonal (1-x)Pb(Mg1/3Nb2/3)O3xPbTiO3 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.

Key words: dielectric property, piezoelectric property, electrooptic effect

中图分类号:  (Dielectric properties of solids and liquids)

  • 77.22.-d
77.65.Bn (Piezoelectric and electrostrictive constants) 78.20.Jq (Electro-optical effects)