A comparative study of the polarization degradation mechanisms during electric cycling in (Bi1/2Na1/2)TiO3-based relaxors

Date
2020-03-15
Authors
Fan, Zhongming
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Elsevier Ltd.
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Materials Science and Engineering
Abstract
The polarization degradation during electric field cycling in a ferroelectric ceramic is closely related to the phase composition. In the present work, electric biasing in-situ transmission electron microscopy (TEM) fatigue tests are conducted on relaxors of (1–x)(Bi1/2Na1/2)TiO3–xSrTiO3. It is directly observed that the ceramic of x = 0.25 features an irreversible relaxor-ferroelectric phase transition and the domain walls in the metastable ferroelectric phase sweep shorter and shorter distances during cycling. In contrast, the ceramic of x = 0.27 features a reversible relaxor-ferroelectric transition and the domain walls in the transient ferroelectric phase remain highly mobile even after 104 cycles.
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This is a manuscript of an article published as Fan, Zhongming, and Xiaoli Tan. "A comparative study of the polarization degradation mechanisms during electric cycling in (Bi1/2Na1/2) TiO3-based relaxors." Scripta Materialia 178 (2020): 334-338. DOI: 10.1016/j.scriptamat.2019.11.061. CC BY-NC-ND. Copyright 2019 Acta Materialia Inc. Posted with permission.
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In-situ TEM, Electric fatigue, Ferroelectric domains, Relaxor-ferroelectric transition
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