Lattice vibrations and dielectric functions of ferroelectric SrBi 2-xNdxNb2O9 bismuth layer-structured ceramics determined by infrared reflectance spectra

M. Zhu; L. Sun; W. W. Li; W. L. Yu; Y. W. Li; Z. G. Hu; J. H. Chu

doi:10.1016/j.materresbull.2010.07.007

Lattice vibrations and dielectric functions of ferroelectric SrBi _2-xNd_xNb₂O₉ bismuth layer-structured ceramics determined by infrared reflectance spectra

M. Zhu, L. Sun, W. W. Li, W. L. Yu, Y. W. Li, Z. G. Hu, J. H. Chu

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

13 Scopus citations

Abstract

Infrared optical properties of SrBi_2-xNd_xNb ₂O₉ (SBNN) ceramics with different Nd compositions (from 0 to 0.2) have been investigated by near-normal incident reflectance technique. The experimental spectra in the wavenumbers range of 350-1500 cm^-1 were analyzed using the Lorentz oscillator model for five infrared-active phonon mode observed. It is found that the frequencies of the NbO₆ tilting and symmetric stretching modes linearly decrease with the Nd composition due to the octahedra distortion. The high-frequency dielectric constant varies in the range from 4.55 ± 0.04 to 4.80 ± 0.04. Owing to the contribution from the stronger electronic transitions, the real part of dielectric function Re(ε) is estimated to about 4.0 in the high-frequency transparent region.

Original language	English
Pages (from-to)	1654-1658
Number of pages	5
Journal	Materials Research Bulletin
Volume	45
Issue number	11
DOIs	https://doi.org/10.1016/j.materresbull.2010.07.007
State	Published - Nov 2010
Externally published	Yes

Keywords

A. Ceramics
C. Infrared spectroscopy
D. Optical properties

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10.1016/j.materresbull.2010.07.007

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title = "Lattice vibrations and dielectric functions of ferroelectric SrBi 2-xNdxNb2O9 bismuth layer-structured ceramics determined by infrared reflectance spectra",

abstract = "Infrared optical properties of SrBi2-xNdxNb 2O9 (SBNN) ceramics with different Nd compositions (from 0 to 0.2) have been investigated by near-normal incident reflectance technique. The experimental spectra in the wavenumbers range of 350-1500 cm-1 were analyzed using the Lorentz oscillator model for five infrared-active phonon mode observed. It is found that the frequencies of the NbO6 tilting and symmetric stretching modes linearly decrease with the Nd composition due to the octahedra distortion. The high-frequency dielectric constant varies in the range from 4.55 ± 0.04 to 4.80 ± 0.04. Owing to the contribution from the stronger electronic transitions, the real part of dielectric function Re(ε) is estimated to about 4.0 in the high-frequency transparent region.",

keywords = "A. Ceramics, C. Infrared spectroscopy, D. Optical properties",

author = "M. Zhu and L. Sun and Li, \{W. W.\} and Yu, \{W. L.\} and Li, \{Y. W.\} and Hu, \{Z. G.\} and Chu, \{J. H.\}",

year = "2010",

month = nov,

doi = "10.1016/j.materresbull.2010.07.007",

language = "英语",

volume = "45",

pages = "1654--1658",

journal = "Materials Research Bulletin",

issn = "0025-5408",

publisher = "Elsevier Ltd",

number = "11",

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TY - JOUR

T1 - Lattice vibrations and dielectric functions of ferroelectric SrBi 2-xNdxNb2O9 bismuth layer-structured ceramics determined by infrared reflectance spectra

AU - Zhu, M.

AU - Sun, L.

AU - Li, W. W.

AU - Yu, W. L.

AU - Li, Y. W.

AU - Hu, Z. G.

AU - Chu, J. H.

PY - 2010/11

Y1 - 2010/11

N2 - Infrared optical properties of SrBi2-xNdxNb 2O9 (SBNN) ceramics with different Nd compositions (from 0 to 0.2) have been investigated by near-normal incident reflectance technique. The experimental spectra in the wavenumbers range of 350-1500 cm-1 were analyzed using the Lorentz oscillator model for five infrared-active phonon mode observed. It is found that the frequencies of the NbO6 tilting and symmetric stretching modes linearly decrease with the Nd composition due to the octahedra distortion. The high-frequency dielectric constant varies in the range from 4.55 ± 0.04 to 4.80 ± 0.04. Owing to the contribution from the stronger electronic transitions, the real part of dielectric function Re(ε) is estimated to about 4.0 in the high-frequency transparent region.

AB - Infrared optical properties of SrBi2-xNdxNb 2O9 (SBNN) ceramics with different Nd compositions (from 0 to 0.2) have been investigated by near-normal incident reflectance technique. The experimental spectra in the wavenumbers range of 350-1500 cm-1 were analyzed using the Lorentz oscillator model for five infrared-active phonon mode observed. It is found that the frequencies of the NbO6 tilting and symmetric stretching modes linearly decrease with the Nd composition due to the octahedra distortion. The high-frequency dielectric constant varies in the range from 4.55 ± 0.04 to 4.80 ± 0.04. Owing to the contribution from the stronger electronic transitions, the real part of dielectric function Re(ε) is estimated to about 4.0 in the high-frequency transparent region.

KW - A. Ceramics

KW - C. Infrared spectroscopy

KW - D. Optical properties

UR - https://www.scopus.com/pages/publications/77957316059

U2 - 10.1016/j.materresbull.2010.07.007

DO - 10.1016/j.materresbull.2010.07.007

M3 - 文章

AN - SCOPUS:77957316059

SN - 0025-5408

VL - 45

SP - 1654

EP - 1658

JO - Materials Research Bulletin

JF - Materials Research Bulletin

IS - 11

ER -

Lattice vibrations and dielectric functions of ferroelectric SrBi _2-xNd_xNb₂O₉ bismuth layer-structured ceramics determined by infrared reflectance spectra

Abstract

Keywords

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