Structure evolution mechanism of Na0.5Bi2.5Nb2-xWxO9+delta ferroelectric ceramics: Temperature-dependent optical evidence and first-principles calculations

doi:10.1103/PhysRevB.96.024101

	Structure evolution mechanism of Na0.5Bi2.5Nb2-xWxO9+delta ferroelectric ceramics: Temperature-dependent optical evidence and first-principles calculations
	Li, Qianqian 1; Wang, Junyong 1; Li, Mengjiao 1; Guo, Shuang 1; Zhang, Jinzhong 1; Hu, Zhigao 1; Zhou, Zhiyong 2; Wang, Genshui 2; Dong, Xianlin 2; Chu, Junhao 1
刊名	PHYSICAL REVIEW B
	2017
卷号	96 期号:2
ISSN号	2469-9950
DOI	10.1103/PhysRevB.96.024101
英文摘要	The effects of W doping on the structure and optical properties of Aurivillius ferroelectric Na0.5Bi2.5Nb2O9-based ceramics have been investigated by x-ray diffraction, far-infrared reflectance, and spectroscopic ellipsometry (SE). Moreover, the temperature dependent lattice dynamics and electronic properties have been systemically explored by Raman scattering (77-800 K) and SE (200-800 K), respectively. The anomalous temperature dependence of phonon frequencies around 600 K can be ascribed to the existence of an intermediate phase between ferroelectric orthorhombic and paraelectric tetragonal phases, which is also confirmed by temperature dependent electronic transitions extracted by the SE technique. In addition, the intrinsic evolution mechanism of the structure and electronic transitions during the phase transitions has been clarified by first-principles calculations, which indicate the effective application of noncontact optical methods in judging the phase transformations of ferroelectric materials.
WOS记录号	WOS:000405021400004
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26664]
专题	中国科学院上海硅酸盐研究所
作者单位	1.East China Normal Univ, Key Lab Polar Mat & Devices MOE, Shanghai 200241, Peoples R China 2.East China Normal Univ, Dept Elect Engn, Tech Ctr Multifunct Magnetoopt Spect Shanghai, Shanghai 200241, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Devices, Shanghai 200050, Peoples R China
推荐引用方式 GB/T 7714	Li, Qianqian,Wang, Junyong,Li, Mengjiao,et al. Structure evolution mechanism of Na0.5Bi2.5Nb2-xWxO9+delta ferroelectric ceramics: Temperature-dependent optical evidence and first-principles calculations[J]. PHYSICAL REVIEW B,2017,96(2).
APA	Li, Qianqian.,Wang, Junyong.,Li, Mengjiao.,Guo, Shuang.,Zhang, Jinzhong.,...&Chu, Junhao.(2017).Structure evolution mechanism of Na0.5Bi2.5Nb2-xWxO9+delta ferroelectric ceramics: Temperature-dependent optical evidence and first-principles calculations.PHYSICAL REVIEW B,96(2).
MLA	Li, Qianqian,et al."Structure evolution mechanism of Na0.5Bi2.5Nb2-xWxO9+delta ferroelectric ceramics: Temperature-dependent optical evidence and first-principles calculations".PHYSICAL REVIEW B 96.2(2017).