Strong domain configuration dependence of the nonlinear dielectric response in (K,Na)NbO3-based ceramics

Yu Huan; Xiaohui Wang; Longtu Li; Jurij Koruza

doi:10.1063/1.4936165

Strong domain configuration dependence of the nonlinear dielectric response in (K,Na)NbO₃-based ceramics

Yu Huan, Xiaohui Wang^*, Longtu Li, Jurij Koruza

^*Corresponding author for this work

Institute of Materials Science, Joining and Forming (3030)

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

Abstract

The nonlinear dielectric response in (Na_0.52K_0.4425Li_0.0375)(Nb_0.92-xTa_xSb_0.08)O₃ ceramics with different amounts of Ta was measured using subcoercive electric fields and quantified by the Rayleigh model. The irreversible extrinsic contribution, mainly caused by the irreversible domain wall translation, was strongly dependent on the domain configuration. The irreversible extrinsic contributions remained approximately the same within the single-phase regions, either orthorhombic or tetragonal, due to the similar domain morphology. However, in the polymorphic phase transition region, the domain wall density was increased by minimized domain size, as observed by transmission electron microscopy. This resulted in constrained domain wall motion due to self-clamping and reduced the irreversible extrinsic contribution.

Original language	English
Article number	202903
Journal	Applied Physics Letters
Volume	107
Issue number	20
DOIs	https://doi.org/10.1063/1.4936165
Publication status	Published - 16 Nov 2015

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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abstract = "The nonlinear dielectric response in (Na0.52K0.4425Li0.0375)(Nb0.92-xTaxSb0.08)O3 ceramics with different amounts of Ta was measured using subcoercive electric fields and quantified by the Rayleigh model. The irreversible extrinsic contribution, mainly caused by the irreversible domain wall translation, was strongly dependent on the domain configuration. The irreversible extrinsic contributions remained approximately the same within the single-phase regions, either orthorhombic or tetragonal, due to the similar domain morphology. However, in the polymorphic phase transition region, the domain wall density was increased by minimized domain size, as observed by transmission electron microscopy. This resulted in constrained domain wall motion due to self-clamping and reduced the irreversible extrinsic contribution.",

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AU - Huan, Yu

AU - Wang, Xiaohui

AU - Li, Longtu

AU - Koruza, Jurij

PY - 2015/11/16

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AB - The nonlinear dielectric response in (Na0.52K0.4425Li0.0375)(Nb0.92-xTaxSb0.08)O3 ceramics with different amounts of Ta was measured using subcoercive electric fields and quantified by the Rayleigh model. The irreversible extrinsic contribution, mainly caused by the irreversible domain wall translation, was strongly dependent on the domain configuration. The irreversible extrinsic contributions remained approximately the same within the single-phase regions, either orthorhombic or tetragonal, due to the similar domain morphology. However, in the polymorphic phase transition region, the domain wall density was increased by minimized domain size, as observed by transmission electron microscopy. This resulted in constrained domain wall motion due to self-clamping and reduced the irreversible extrinsic contribution.

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Strong domain configuration dependence of the nonlinear dielectric response in (K,Na)NbO₃-based ceramics

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