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Phase transformation induced by electric field and mechanical stress in Mn-doped (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3 ceramics

Ehara, Yoshitaka and Novak, Nikola and Ayrikyan, Azatuhi and Geiger, Philipp T. and Webber, Kyle G. (2016):
Phase transformation induced by electric field and mechanical stress in Mn-doped (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3 ceramics.
In: Journal of Applied Physics, AIP Publishing, 120, (174103), ISSN 00218979, [Online-Edition: http://dx.doi.org/10.1063/1.4966614],
[Article]

Abstract

Electric-field- and stress-induced phase transformations were investigated in polycrystalline 0.5 mol. % Mn-doped (1�x)(Bi1/2Na1/2)TiO3-x(Bi1/2K1/2)TiO3 (x ¼ 0.1, 0.2). To characterize the effect of electric field and stress on the stability of the ferroelectric and relaxor states, polarizationand current density-electric field curves, as well as the stress-strain response as a function of temperature were characterized. Analogous to the observed electrical behavior, the macroscopic mechanical constitutive behavior showed a closed hysteresis at elevated temperatures, indicating a reversible stress-induced relaxor-to-ferroelectric transformation. The electrical and mechanical measurements were used to construct electric field–temperature and stress-temperature phase diagrams, which show similar characteristics. These data show that a mechanical compressive stress,similarly to an electric field, can induce long-range ferroelectric order in a relaxor ferroelectric.

Item Type: Article
Erschienen: 2016
Creators: Ehara, Yoshitaka and Novak, Nikola and Ayrikyan, Azatuhi and Geiger, Philipp T. and Webber, Kyle G.
Title: Phase transformation induced by electric field and mechanical stress in Mn-doped (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3 ceramics
Language: English
Abstract:

Electric-field- and stress-induced phase transformations were investigated in polycrystalline 0.5 mol. % Mn-doped (1�x)(Bi1/2Na1/2)TiO3-x(Bi1/2K1/2)TiO3 (x ¼ 0.1, 0.2). To characterize the effect of electric field and stress on the stability of the ferroelectric and relaxor states, polarizationand current density-electric field curves, as well as the stress-strain response as a function of temperature were characterized. Analogous to the observed electrical behavior, the macroscopic mechanical constitutive behavior showed a closed hysteresis at elevated temperatures, indicating a reversible stress-induced relaxor-to-ferroelectric transformation. The electrical and mechanical measurements were used to construct electric field–temperature and stress-temperature phase diagrams, which show similar characteristics. These data show that a mechanical compressive stress,similarly to an electric field, can induce long-range ferroelectric order in a relaxor ferroelectric.

Journal or Publication Title: Journal of Applied Physics
Volume: 120
Number: 174103
Publisher: AIP Publishing
Divisions: 11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences
Date Deposited: 15 Nov 2016 06:41
Official URL: http://dx.doi.org/10.1063/1.4966614
Identification Number: doi:10.1063/1.4966614
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