The effect of polar nanoregions on electromechanical properties of relaxor-PbTiO3 crystals: Extracting from electric-field-induced polarization and strain behaviors

Fei Li; Zhuo Xu; Shujun Zhang

doi:10.1063/1.4896578

The effect of polar nanoregions on electromechanical properties of relaxor-PbTiO₃ crystals: Extracting from electric-field-induced polarization and strain behaviors

Fei Li, Zhuo Xu, Shujun Zhang

Materials Research Institute (MRI)

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

The electric-field-induced polarization and strain of Pb(Mg_1/3Nb_2/3)O₃ (PMN) and Pb(Mg_1/3Nb_2/3)O₃-0.27PbTiO₃ (PMN-0.27PT) crystals were investigated at temperatures above their respective maximum permittivity temperatures T_m, where the macro-polarizations vanish while polar nanoregions (PNRs) still persist. The local structure of PNRs was proved to be of rhombohedral phase in PMN, while the local phase was unstable for PMN-0.27PT, leading to the isotropic spontaneous polarization of PNRs and strong anisotropic electric-field-induced strain. The electrostrictive coefficient Q₃₃ was determined as functions of temperature and E-field, with 50% increment over temperature range of 20-∼120-°C for PMN, being attributed to the decrease of spontaneous polarization of PNRs with increasing temperature. The results presented in this paper indicate that the local structure and spontaneous polarization of PNRs play important roles on electromechanical properties of relaxor ferroelectrics.

Original language	English (US)
Article number	122904
Journal	Applied Physics Letters
Volume	105
Issue number	12
DOIs	https://doi.org/10.1063/1.4896578
State	Published - Sep 22 2014

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4896578

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title = "The effect of polar nanoregions on electromechanical properties of relaxor-PbTiO3 crystals: Extracting from electric-field-induced polarization and strain behaviors",

abstract = "The electric-field-induced polarization and strain of Pb(Mg1/3Nb2/3)O3 (PMN) and Pb(Mg1/3Nb2/3)O3-0.27PbTiO3 (PMN-0.27PT) crystals were investigated at temperatures above their respective maximum permittivity temperatures Tm, where the macro-polarizations vanish while polar nanoregions (PNRs) still persist. The local structure of PNRs was proved to be of rhombohedral phase in PMN, while the local phase was unstable for PMN-0.27PT, leading to the isotropic spontaneous polarization of PNRs and strong anisotropic electric-field-induced strain. The electrostrictive coefficient Q33 was determined as functions of temperature and E-field, with 50% increment over temperature range of 20-∼120-°C for PMN, being attributed to the decrease of spontaneous polarization of PNRs with increasing temperature. The results presented in this paper indicate that the local structure and spontaneous polarization of PNRs play important roles on electromechanical properties of relaxor ferroelectrics.",

author = "Fei Li and Zhuo Xu and Shujun Zhang",

note = "Publisher Copyright: {\textcopyright} 2014 AIP Publishing LLC.",

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doi = "10.1063/1.4896578",

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T1 - The effect of polar nanoregions on electromechanical properties of relaxor-PbTiO3 crystals

T2 - Extracting from electric-field-induced polarization and strain behaviors

AU - Li, Fei

AU - Xu, Zhuo

AU - Zhang, Shujun

PY - 2014/9/22

Y1 - 2014/9/22

N2 - The electric-field-induced polarization and strain of Pb(Mg1/3Nb2/3)O3 (PMN) and Pb(Mg1/3Nb2/3)O3-0.27PbTiO3 (PMN-0.27PT) crystals were investigated at temperatures above their respective maximum permittivity temperatures Tm, where the macro-polarizations vanish while polar nanoregions (PNRs) still persist. The local structure of PNRs was proved to be of rhombohedral phase in PMN, while the local phase was unstable for PMN-0.27PT, leading to the isotropic spontaneous polarization of PNRs and strong anisotropic electric-field-induced strain. The electrostrictive coefficient Q33 was determined as functions of temperature and E-field, with 50% increment over temperature range of 20-∼120-°C for PMN, being attributed to the decrease of spontaneous polarization of PNRs with increasing temperature. The results presented in this paper indicate that the local structure and spontaneous polarization of PNRs play important roles on electromechanical properties of relaxor ferroelectrics.

AB - The electric-field-induced polarization and strain of Pb(Mg1/3Nb2/3)O3 (PMN) and Pb(Mg1/3Nb2/3)O3-0.27PbTiO3 (PMN-0.27PT) crystals were investigated at temperatures above their respective maximum permittivity temperatures Tm, where the macro-polarizations vanish while polar nanoregions (PNRs) still persist. The local structure of PNRs was proved to be of rhombohedral phase in PMN, while the local phase was unstable for PMN-0.27PT, leading to the isotropic spontaneous polarization of PNRs and strong anisotropic electric-field-induced strain. The electrostrictive coefficient Q33 was determined as functions of temperature and E-field, with 50% increment over temperature range of 20-∼120-°C for PMN, being attributed to the decrease of spontaneous polarization of PNRs with increasing temperature. The results presented in this paper indicate that the local structure and spontaneous polarization of PNRs play important roles on electromechanical properties of relaxor ferroelectrics.

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The effect of polar nanoregions on electromechanical properties of relaxor-PbTiO₃ crystals: Extracting from electric-field-induced polarization and strain behaviors

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