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Domain engineering and full matrix material constants of [111]c-poled 0.63Pb(Mg1/3Nb2/3)-0.37PbTiO3 single crystal


Domain engineering was performed on [111]c-oriented tetragonal ferroelectric 0.63Pb(Mg1/3Nb2/3)-0.37PbTiO3 (PMN-0.37PT) single crystal in order to achieve better piezoelectric properties. Influences of the poling electric field (EP), poling temperature, and poling time on piezoelectric and electromechanical properties was investigated. The piezoelectric and dielectric constants increase with increasing the EP. In addition, the piezoelectric response increases with poling time but saturates after 10 min poling at 30 °C or 20 min at 150 °C under EP = 2 kV/mm. The piezoelectric strain coefficient d33 can be improved from 407 pC/N poled at 30°C to 706 pC/N after poling at 150 °C near TC, which is 27.9% higher than the highest value reported before (d33=551.9 pC/N). The enhancement of piezoelectric response results from the domain structure redistribution occurring near the ferroelectric to paraelectric phase transition temperature because the potential barrier is substantially lowered so that polarization switching becomes easier. Therefore, more domain walls appear to be beneficial for the enhancement of the piezoelectric response. Under the optimized poling condition, a complete set of dielectric, elastic, and piezoelectric constants was measured for [111]c-poled PMN-0.37PT single crystal using combined resonance and ultrasonic method (CRUM). Both the longitudinal (d33=706 pC/N) and shear (d15=875 pC/N) piezoelectric properties are outstanding for the [111]c-poled PMN-0.37PT single crystal due to domain wall motions.

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Publication details

The article was received on 20 May 2018, accepted on 11 Jul 2018 and first published on 11 Jul 2018

Article type: Paper
DOI: 10.1039/C8CE00831K
Citation: CrystEngComm, 2018, Accepted Manuscript
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    Domain engineering and full matrix material constants of [111]c-poled 0.63Pb(Mg1/3Nb2/3)-0.37PbTiO3 single crystal

    Z. Yuan, S. Sang, E. Sun, X. Qi, W. Chang, R. Zhang, B. Yang, X. Jiang and W. Cao, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE00831K

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