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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
Source PublicationPHYSICAL REVIEW B
ISSN2469-9950
Volume96Issue:2
AbstractThe 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 IDWOS:000405021400004
EI Accession Number2469-9969
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/26664
Collection中国科学院上海硅酸盐研究所
Affiliation1.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
Recommended Citation
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).
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