標題: Investigation of nanodomain pattern and piezoelectric behavior of mixed phases in epitaxial BiFeO(3) films
作者: Kuo, H. Y.
Shu, Y. C.
Chen, H. Z.
Hsueh, C. J.
Wang, C. H.
Chu, Y. H.
土木工程學系
材料科學與工程學系
Department of Civil Engineering
Department of Materials Science and Engineering
公開日期: 1-Dec-2011
摘要: Mixed phases of rhombohedral and tetragonal ferroelectric variants have been recently observed to coexist through epitaxial constraints in bismuth ferrite films. They form stripe-like domain patterns with orientations closely parallel to the substrate edges and exhibit unusually large piezoelectric response in the stripe areas. Here a model is developed for explaining the peculiar domain orientations as well as the enhancement of piezoelectricity in the mixed phase. The former is determined by the relative magnitudes of elastic and depolarization energy, whereas the latter is ascribed to the strain-driven softening in dielectric stiffness. The predictions show the similar trend as those observed in recent experiments. (C) 2011 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jeurceramsoc.2011.04.010
http://hdl.handle.net/11536/14561
ISSN: 0955-2219
DOI: 10.1016/j.jeurceramsoc.2011.04.010
期刊: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume: 31
Issue: 16
起始頁: 3063
結束頁: 3071
Appears in Collections:Conferences Paper