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Structure evolution mechanism of Na0.5Bi2.5Nb2-xWxO9+delta ferroelectric ceramics: Temperature-dependent optical evidence and first-principles calculations
Li, Qianqian1; Wang, Junyong1; Li, Mengjiao1; Guo, Shuang1; Zhang, Jinzhong1; Hu, Zhigao1; Zhou, Zhiyong2; Wang, Genshui2; Dong, Xianlin2; Chu, Junhao1
2017
发表期刊PHYSICAL REVIEW B
ISSN2469-9950
卷号96期号:2
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.
DOI10.1103/PhysRevB.96.024101
WOS记录号WOS:000405021400004
EI入藏号2469-9969
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符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
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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).
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