Chin. Phys. Lett.  2003, Vol. 20 Issue (7): 1131-1133    DOI:
Original Articles |
Room-Temperature Nonlinear Dielectric Constants and Dielectric Tunability in Poled Pb(Mg1/3Nb2/3) O3-PbTiO3 Single Crystals
ZHAO Xiang-Yong1,2;WANG Jie2;Chew Khian-Hooi2;Chan Wa-Lai Helen2;Choy Chung-Loong2;LUO Hao-Su1
1State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800 2Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong
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ZHAO Xiang-Yong, WANG Jie, Chew Khian-Hooi et al  2003 Chin. Phys. Lett. 20 1131-1133
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Abstract The room-temperature second-, third- and fourth-order nonlinear dielectric constants of poled (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 single crystals were determined by measuring the dielectric response at a frequency of 10 kHz and under a dc bias of 0-1000 V/mm. Tunability of the apparent dielectric constant εr was also defined and examined. The results show the phase structure, domain state, composition and orientation dependences of the dielectric nonlinearity and tunability. It is also shown that the <011>-poled monodomain orthorhombic ferroelectric 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3 single crystal has the largest nonlinear dielectric constants and the highest tunability of εr in the monodomain crystals. It could be a most promising candidate for applications where a high dielectric nonlinearity is needed.
Keywords: 77.22.-d     
Published: 01 July 2003
PACS:  77.22.-d (Dielectric properties of solids and liquids)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2003/V20/I7/01131
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ZHAO Xiang-Yong
WANG Jie
Chew Khian-Hooi
Chan Wa-Lai Helen
Choy Chung-Loong
LUO Hao-Su
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