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Effect of uniaxial stress on the electromechanical response of <001>-oriented Pb(Mg1/3Nb2/3)O3PbTiO3 crystals

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5 Author(s)
Feng, Zuyong ; The State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 215 Chengbei Road, Jiading, Shanghai 201800, People’s Republic of China ; Lin, Di ; Haosu Luo ; Li, Shang
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The <001>-oriented 0.7PMN–0.3PT and 0.67PMN–0.33PT crystals are characterized under uniaxial stress and electric field loading above the coercive field. Strain-electric-field and electric-displacement-electric-field hysteresis loops are measured at various compressive stresses showing a notable effect of stress on the electromechanical coupling. A moderate uniaxial stress can advance their electromechanical properties. Stress-strain curves are run at zero electric field, showing that depolarization for <001>-oriented 0.7PMN–0.3PT crystal begins at 7 MPa, while as little as 3 MPa for 0.67PMN–0.33PT crystal, placing a severe limitation in actuator applications.

Published in:

Journal of Applied Physics  (Volume:97 ,  Issue: 2 )