Coexistence of Ferroelectric Phases and Phonon Dynamics in Relaxor Ferroelectric Na0.5Bi0.5TiO3 Based Single Crystals

CORC > 上海硅酸盐研究所 > 中国科学院上海硅酸盐研究所 > 无机功能材料与器件重点实验室 > 期刊论文

	Coexistence of Ferroelectric Phases and Phonon Dynamics in Relaxor Ferroelectric Na0.5Bi0.5TiO3 Based Single Crystals
	Zhu, Jiajun 1; Zhang, Jinzhong 1; Jiang, Kai 1; Zhang, Haiwu 2; Hu, Zhigao 1; Luo, Haosu 2; Chu, Junhao 1
刊名	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
	2016-07-01
卷号	99 期号:7 页码:2408-2414
关键词	Raman spectroscopy relaxor ferroelectrics phase transitions
英文摘要	A combination of polarized Raman technique, infrared reflectance spectra, and first-principles density-functional theoretical calculations were used to investigate structure transformation and lattice vibrations of Na0.5Bi0.5TiO3, Na0.5Bi0.5TiO3-5% BaTiO3, and Na0.5Bi0.5TiO3-8% K0.5Bi0.5TiO3 single crystals. It was found that Na0.5Bi0.5TiO3 is of a two-phase mixture with rhombohedral and monoclinic structures at room temperature. Correspondingly, three Raman-active phonon modes located at 395, 790, and 868 cm(-1), which were previously assumed as A(1) modes of rhombohedral phase have been reassigned as A '', A', and A' modes of monoclinic phase in the present work. In particular, a strong low-frequency A '' mode at 49 cm(-1) was found and its temperature dependence was revealed. Two deviations from linearity for the abrupt frequency variation in the A '' mode and Ti-O bond have been detected at temperatures of ferroelectric to antiferroelectric phase transition TF-AF and dielectric maximum temperature T-max. The appearance of Na-O vibrations at 150 cm(-1) was found below T-max, indicating the existence of nanosized Na+TiO3 clusters. The observed Raman and infrared active modes belonging to distinct irreducible representations are in good agreement with group-theory predictions, which suggests 9A(1)+9E and 36A ''+24A' modes for the rhombohedral and monoclinic phases of Na0.5Bi0.5TiO3, respectively.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Materials Science, Ceramics
研究领域[WOS]	Materials Science
关键词[WOS]	POLARIZATION ROTATION ; X-RAY ; NA1/2BI1/2TIO3 ; RAMAN ; PIEZOELECTRICS ; SPECTROSCOPY ; DIFFRACTION ; SPECTRA ; FILMS ; PB
收录类别	SCI
语种	英语
WOS记录号	WOS:000384995800028
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/22021]
专题	上海硅酸盐研究所_无机功能材料与器件重点实验室_期刊论文
作者单位	1.East China Normal Univ, Dept Elect Engn, Shanghai 200241, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Device, Shanghai 201800, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Jiajun,Zhang, Jinzhong,Jiang, Kai,et al. Coexistence of Ferroelectric Phases and Phonon Dynamics in Relaxor Ferroelectric Na0.5Bi0.5TiO3 Based Single Crystals[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2016,99(7):2408-2414.
APA	Zhu, Jiajun.,Zhang, Jinzhong.,Jiang, Kai.,Zhang, Haiwu.,Hu, Zhigao.,...&Chu, Junhao.(2016).Coexistence of Ferroelectric Phases and Phonon Dynamics in Relaxor Ferroelectric Na0.5Bi0.5TiO3 Based Single Crystals.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,99(7),2408-2414.
MLA	Zhu, Jiajun,et al."Coexistence of Ferroelectric Phases and Phonon Dynamics in Relaxor Ferroelectric Na0.5Bi0.5TiO3 Based Single Crystals".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 99.7(2016):2408-2414.