Chin. Phys. Lett.  2006, Vol. 23 Issue (6): 1596-1599    DOI:
Original Articles |
Field-Induced Domain Reorientation and Polarization Rotation of <110> Oriented Pb(Mg1/3Nb2/3)O3-PbTiO3 Single Crystals
CHEN Ke-Pi1;ZHANG Xiao-Wen2;FANG Fei3
1Key Laboratory of Condition Monitoring and Control for Power Plant Equipment (Ministry of Education), North China Electric Power University, Beijing 102206 2State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 3Department of Engineering Mechanics, Tsinghua University, Beijing 100084
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CHEN Ke-Pi, ZHANG Xiao-Wen, FANG Fei 2006 Chin. Phys. Lett. 23 1596-1599
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Abstract Polarization hysteresis loops, x-ray diffraction and temperature dependent dielectric constant under different electric fields for <110> oriented 0.7PMN-0.3PT crystals are measured. The field-induced phase transition and the process of depolarization are discussed. The results show that with the electric field E increasing, the single-crystal form changes from the relaxor state of rhombohedral to normal rhombohedral, then to a monoclinic state via polar-axis reorientation and polarization rotation. Orthorhombic phase may present when E≥10kV, but it is an unstable form after E removal. The depolarization process is not just the reversal of the polarization process. It is noticed that only the temperature-dependent dielectric behaviour is not enough to judge the processes of the E-field induced phase transition.
Keywords: 77.84.Dy      77.65.-j      77.80.Bh     
Published: 01 June 2006
PACS:  77.84.Dy  
  77.65.-j (Piezoelectricity and electromechanical effects)  
  77.80.Bh  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2006/V23/I6/01596
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