Intrinsic relationship between electronic structures and phase transition of SrBi2-xNdxNb2O9 ceramics from ultraviolet ellipsometry at elevated temperatures

Z. H. Duan; K. Jiang; L. P. Xu; Y. W. Li; Z. G. Hu; J. H. Chu

doi:10.1063/1.4864715

Intrinsic relationship between electronic structures and phase transition of SrBi_2-xNd_xNb₂O₉ ceramics from ultraviolet ellipsometry at elevated temperatures

Z. H. Duan
, K. Jiang
, L. P. Xu
, Y. W. Li
, Z. G. Hu^*
, J. H. Chu

^*Corresponding author for this work

School of Physics and Electronic Science

East China Normal University

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The ferroelectric orthorhombic to paraelectric tetragonal phase transition of SrBi_2-xNd_xNb₂O₉ (x = 0, 0.05, 0.1, and 0.2) layer-structured ceramics has been investigated by temperature-dependent spectroscopic ellipsometry. Based on the analysis of dielectric functions from 0 to 500 °C with double Tauc-Lorentz dispersion model, the interband transitions located at ultraviolet region have shown an abrupt variation near the Curie temperature. The changes of dielectric functions are mainly due to the thermal-optical and/or photoelastic effect. Moreover, the characteristic alteration in interband transitions can be ascribed to distortion of NbO₆ octahedron and variation of hybridization between Bi 6s and O 2p states during the structure transformation.

Original language	English
Article number	054107
Journal	Journal of Applied Physics
Volume	115
Issue number	5
DOIs	https://doi.org/10.1063/1.4864715
State	Published - 7 Feb 2014

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title = "Intrinsic relationship between electronic structures and phase transition of SrBi2-xNdxNb2O9 ceramics from ultraviolet ellipsometry at elevated temperatures",

abstract = "The ferroelectric orthorhombic to paraelectric tetragonal phase transition of SrBi2-xNdxNb2O9 (x = 0, 0.05, 0.1, and 0.2) layer-structured ceramics has been investigated by temperature-dependent spectroscopic ellipsometry. Based on the analysis of dielectric functions from 0 to 500 °C with double Tauc-Lorentz dispersion model, the interband transitions located at ultraviolet region have shown an abrupt variation near the Curie temperature. The changes of dielectric functions are mainly due to the thermal-optical and/or photoelastic effect. Moreover, the characteristic alteration in interband transitions can be ascribed to distortion of NbO6 octahedron and variation of hybridization between Bi 6s and O 2p states during the structure transformation.",

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doi = "10.1063/1.4864715",

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T1 - Intrinsic relationship between electronic structures and phase transition of SrBi2-xNdxNb2O9 ceramics from ultraviolet ellipsometry at elevated temperatures

AU - Duan, Z. H.

AU - Jiang, K.

AU - Xu, L. P.

AU - Li, Y. W.

AU - Hu, Z. G.

AU - Chu, J. H.

PY - 2014/2/7

Y1 - 2014/2/7

N2 - The ferroelectric orthorhombic to paraelectric tetragonal phase transition of SrBi2-xNdxNb2O9 (x = 0, 0.05, 0.1, and 0.2) layer-structured ceramics has been investigated by temperature-dependent spectroscopic ellipsometry. Based on the analysis of dielectric functions from 0 to 500 °C with double Tauc-Lorentz dispersion model, the interband transitions located at ultraviolet region have shown an abrupt variation near the Curie temperature. The changes of dielectric functions are mainly due to the thermal-optical and/or photoelastic effect. Moreover, the characteristic alteration in interband transitions can be ascribed to distortion of NbO6 octahedron and variation of hybridization between Bi 6s and O 2p states during the structure transformation.

AB - The ferroelectric orthorhombic to paraelectric tetragonal phase transition of SrBi2-xNdxNb2O9 (x = 0, 0.05, 0.1, and 0.2) layer-structured ceramics has been investigated by temperature-dependent spectroscopic ellipsometry. Based on the analysis of dielectric functions from 0 to 500 °C with double Tauc-Lorentz dispersion model, the interband transitions located at ultraviolet region have shown an abrupt variation near the Curie temperature. The changes of dielectric functions are mainly due to the thermal-optical and/or photoelastic effect. Moreover, the characteristic alteration in interband transitions can be ascribed to distortion of NbO6 octahedron and variation of hybridization between Bi 6s and O 2p states during the structure transformation.

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U2 - 10.1063/1.4864715

DO - 10.1063/1.4864715

M3 - 文章

AN - SCOPUS:84906848122

SN - 0021-8979

VL - 115

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 5

M1 - 054107

ER -

Intrinsic relationship between electronic structures and phase transition of SrBi_2-xNd_xNb₂O₉ ceramics from ultraviolet ellipsometry at elevated temperatures

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