A comparative study of the polarization degradation mechanisms during electric cycling in (Bi1/2Na1/2)TiO3-based relaxors. (15th March 2020)

• Record Type: Journal Article
• Authors: Fan, Zhongming; Tan, Xiaoli
• Is Part Of: Scripta materialia. Number 178(2020)
• Page Start: 334
• Page End: 338
• Publication Date: 2020-03-15
• Subjects: In-situ TEM -- Electric fatigue -- Ferroelectric domains -- Relaxor-ferroelectric transition; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.11.061
• Languages: English
• ISSNs: 1359-6462

Abstract

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 )(Bi1/2 Na1/2 )TiO3 – x SrTiO3 . 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 10 4 cycles. Graphical abstract: Image, graphical abstract