Alternating current field effect on the freezing temperature of relaxor ferroelectrics

Eugene V. Colla; Surya M. Gupta; Dwight Viehland

doi:10.1063/1.369456

Alternating current field effect on the freezing temperature of relaxor ferroelectrics

Eugene V. Colla, Surya M. Gupta, Dwight Viehland

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

Abstract

Alternating current-field effects on the freezing temperature of La-modified lead magnesium niobate-lead titanate crystalline solutions for compositions near to the morphotropic phase boundary have been studied by dielectric spectroscopy. Charge imbalance due to La substitution (0-10 at.%) in [Pb(Mg_1/3Nb_2/3)O₃]_0.65(PbTiO ₃)_0.35 was compensated by changing the B-site cation ratio. The frequency dispersion in the dielectric constant was found to increase with increasing La substitution. Relaxor-like dielectric characteristics were induced for La concentrations greater than 5 at.%. It was also found that the dielectric constant maximum (ε_max^′) increased and the temperature of ε_max^′ decreased with increasing ac field. In addition, a threshold electric field was observed above which nonlinearities became evident in the dielectric response and the freezing temperature was reduced.

Original language	English (US)
Pages (from-to)	362-367
Number of pages	6
Journal	Journal of Applied Physics
Volume	85
Issue number	1
DOIs	https://doi.org/10.1063/1.369456
State	Published - 1999
Externally published	Yes

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General Physics and Astronomy

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title = "Alternating current field effect on the freezing temperature of relaxor ferroelectrics",

abstract = "Alternating current-field effects on the freezing temperature of La-modified lead magnesium niobate-lead titanate crystalline solutions for compositions near to the morphotropic phase boundary have been studied by dielectric spectroscopy. Charge imbalance due to La substitution (0-10 at.%) in [Pb(Mg1/3Nb2/3)O3]0.65(PbTiO 3)0.35 was compensated by changing the B-site cation ratio. The frequency dispersion in the dielectric constant was found to increase with increasing La substitution. Relaxor-like dielectric characteristics were induced for La concentrations greater than 5 at.%. It was also found that the dielectric constant maximum (εmax′) increased and the temperature of εmax′ decreased with increasing ac field. In addition, a threshold electric field was observed above which nonlinearities became evident in the dielectric response and the freezing temperature was reduced.",

author = "Colla, {Eugene V.} and Gupta, {Surya M.} and Dwight Viehland",

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journal = "Journal of Applied Physics",

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AU - Colla, Eugene V.

AU - Gupta, Surya M.

AU - Viehland, Dwight

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N2 - Alternating current-field effects on the freezing temperature of La-modified lead magnesium niobate-lead titanate crystalline solutions for compositions near to the morphotropic phase boundary have been studied by dielectric spectroscopy. Charge imbalance due to La substitution (0-10 at.%) in [Pb(Mg1/3Nb2/3)O3]0.65(PbTiO 3)0.35 was compensated by changing the B-site cation ratio. The frequency dispersion in the dielectric constant was found to increase with increasing La substitution. Relaxor-like dielectric characteristics were induced for La concentrations greater than 5 at.%. It was also found that the dielectric constant maximum (εmax′) increased and the temperature of εmax′ decreased with increasing ac field. In addition, a threshold electric field was observed above which nonlinearities became evident in the dielectric response and the freezing temperature was reduced.

AB - Alternating current-field effects on the freezing temperature of La-modified lead magnesium niobate-lead titanate crystalline solutions for compositions near to the morphotropic phase boundary have been studied by dielectric spectroscopy. Charge imbalance due to La substitution (0-10 at.%) in [Pb(Mg1/3Nb2/3)O3]0.65(PbTiO 3)0.35 was compensated by changing the B-site cation ratio. The frequency dispersion in the dielectric constant was found to increase with increasing La substitution. Relaxor-like dielectric characteristics were induced for La concentrations greater than 5 at.%. It was also found that the dielectric constant maximum (εmax′) increased and the temperature of εmax′ decreased with increasing ac field. In addition, a threshold electric field was observed above which nonlinearities became evident in the dielectric response and the freezing temperature was reduced.

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Alternating current field effect on the freezing temperature of relaxor ferroelectrics

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