Phase Transition Behaviors of Lead-Free (Na1/2Bi1/2)TiO3-BaTiO3 Single Crystals Studied by Inelastic Light Scattering Spectroscopy

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	Phase Transition Behaviors of Lead-Free (Na1/2Bi1/2)TiO3-BaTiO3 Single Crystals Studied by Inelastic Light Scattering Spectroscopy
	Lee, Byoung Wan 1; Ko, Jae-Hyeon 1; Li, Xiaobing 2; Luo, Haosu 2
刊名	FERROELECTRICS
	2016-01-02
卷号	490 期号:1 页码:43-50
关键词	Lead-free NBT-BT Brillouin scattering phase transition
英文摘要	Acoustic anomalies of (1-x)(Na1/2Bi1/2)TiO3-xBaTiO(3) (NBT-xBT) with x = 0.05 were investigated over a wide temperature range of from 900 degrees C to -200 degrees C by using Brillouin light scattering. The sound velocity of the longitudinal acoustic mode propagating along the [100] direction showed a substantial softening, while the acoustic attenuation coefficient of this mode exhibited a large increase in the paraelectric phase. These anomalies were attributed to the formation and growth of noncentrosymmetric polar regions in the paraelectric phase, which was supported by the appearance of the strong polarized central peak. The absence of any sharp or discontinuous changes in the acoustic properties seems to suggest that the polar regions remain short-ranged and do not form macroscopic polar domains at low temperatures, which may be attributed to the inherent A-site disorder induced by random substitutions of Bi, Na and Ba cations.
WOS标题词	Science & Technology ; Technology ; Physical Sciences
类目[WOS]	Materials Science, Multidisciplinary ; Physics, Condensed Matter
研究领域[WOS]	Materials Science ; Physics
关键词[WOS]	BRILLOUIN-SCATTERING ; RAMAN-SPECTROSCOPY ; ELASTIC ANOMALIES ; CERAMICS ; BOUNDARY ; SYSTEM
收录类别	SCI
语种	英语
WOS记录号	WOS:000369189600005
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/23247]
专题	上海硅酸盐研究所_人工晶体研究中心_期刊论文
作者单位	1.Hallym Univ, Dept Phys, 1 Hallymdaehakgil, Chunchon 200702, Gangwondo, South Korea 2.Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 201800, Peoples R China
推荐引用方式 GB/T 7714	Lee, Byoung Wan,Ko, Jae-Hyeon,Li, Xiaobing,et al. Phase Transition Behaviors of Lead-Free (Na1/2Bi1/2)TiO3-BaTiO3 Single Crystals Studied by Inelastic Light Scattering Spectroscopy[J]. FERROELECTRICS,2016,490(1):43-50.
APA	Lee, Byoung Wan,Ko, Jae-Hyeon,Li, Xiaobing,&Luo, Haosu.(2016).Phase Transition Behaviors of Lead-Free (Na1/2Bi1/2)TiO3-BaTiO3 Single Crystals Studied by Inelastic Light Scattering Spectroscopy.FERROELECTRICS,490(1),43-50.
MLA	Lee, Byoung Wan,et al."Phase Transition Behaviors of Lead-Free (Na1/2Bi1/2)TiO3-BaTiO3 Single Crystals Studied by Inelastic Light Scattering Spectroscopy".FERROELECTRICS 490.1(2016):43-50.