Evolution of the chemical bonding nature of ferroelectric bismuth titanate upon cation substitution

Su Gil Hur; Dae Hoon Park; Tae Woo Kim; Seong Ju Hwang

doi:10.1063/1.1814818

Evolution of the chemical bonding nature of ferroelectric bismuth titanate upon cation substitution

Su Gil Hur, Dae Hoon Park, Tae Woo Kim, Seong Ju Hwang

Department of Materials Science and Engineering

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

30 Citations (Scopus)

Abstract

The effect of cation substitution on the crystal and electronic structures of ferroelectric bismuth titanate has been systematically investigated. According to the x-ray diffraction analyses on Bi_3.25A _0.75Ti₃O₁₂ (A = Bi, La, Gd, and Y), it was found that the cation substitution gives rise to the contraction of the volume of the unit cell and to the decrease of the structural distortion of the bismuth titanate, as well. The present x-ray absorption spectroscopic results reveal that the local structural change upon chemical reduction is remarkably depressed by the cation substitution through the enhancement of (Ti - O) bonds. Such a stabilization of TiO₆ octahedra can be understood by a competition between adjacent (Bi - O) and (Ti - O) bonds as well as the contraction of the unit cell.

Original language	English
Pages (from-to)	4130-4132
Number of pages	3
Journal	Applied Physics Letters
Volume	85
Issue number	18
DOIs	https://doi.org/10.1063/1.1814818
Publication status	Published - 2004 Nov 1

Bibliographical note

Funding Information:
This work was supported by Grant No. R08-2003-000-10409-0 from the Basic Research Program of the Korea Science and Engineering Foundation. The experiments at PLS were supported in part by MOST and POSTECH.

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.1814818

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title = "Evolution of the chemical bonding nature of ferroelectric bismuth titanate upon cation substitution",

abstract = "The effect of cation substitution on the crystal and electronic structures of ferroelectric bismuth titanate has been systematically investigated. According to the x-ray diffraction analyses on Bi3.25A 0.75Ti3O12 (A = Bi, La, Gd, and Y), it was found that the cation substitution gives rise to the contraction of the volume of the unit cell and to the decrease of the structural distortion of the bismuth titanate, as well. The present x-ray absorption spectroscopic results reveal that the local structural change upon chemical reduction is remarkably depressed by the cation substitution through the enhancement of (Ti - O) bonds. Such a stabilization of TiO6 octahedra can be understood by a competition between adjacent (Bi - O) and (Ti - O) bonds as well as the contraction of the unit cell.",

author = "Hur, {Su Gil} and Park, {Dae Hoon} and Kim, {Tae Woo} and Hwang, {Seong Ju}",

note = "Funding Information: This work was supported by Grant No. R08-2003-000-10409-0 from the Basic Research Program of the Korea Science and Engineering Foundation. The experiments at PLS were supported in part by MOST and POSTECH. ",

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AU - Hur, Su Gil

AU - Park, Dae Hoon

AU - Kim, Tae Woo

AU - Hwang, Seong Ju

N1 - Funding Information: This work was supported by Grant No. R08-2003-000-10409-0 from the Basic Research Program of the Korea Science and Engineering Foundation. The experiments at PLS were supported in part by MOST and POSTECH.

PY - 2004/11/1

Y1 - 2004/11/1

N2 - The effect of cation substitution on the crystal and electronic structures of ferroelectric bismuth titanate has been systematically investigated. According to the x-ray diffraction analyses on Bi3.25A 0.75Ti3O12 (A = Bi, La, Gd, and Y), it was found that the cation substitution gives rise to the contraction of the volume of the unit cell and to the decrease of the structural distortion of the bismuth titanate, as well. The present x-ray absorption spectroscopic results reveal that the local structural change upon chemical reduction is remarkably depressed by the cation substitution through the enhancement of (Ti - O) bonds. Such a stabilization of TiO6 octahedra can be understood by a competition between adjacent (Bi - O) and (Ti - O) bonds as well as the contraction of the unit cell.

AB - The effect of cation substitution on the crystal and electronic structures of ferroelectric bismuth titanate has been systematically investigated. According to the x-ray diffraction analyses on Bi3.25A 0.75Ti3O12 (A = Bi, La, Gd, and Y), it was found that the cation substitution gives rise to the contraction of the volume of the unit cell and to the decrease of the structural distortion of the bismuth titanate, as well. The present x-ray absorption spectroscopic results reveal that the local structural change upon chemical reduction is remarkably depressed by the cation substitution through the enhancement of (Ti - O) bonds. Such a stabilization of TiO6 octahedra can be understood by a competition between adjacent (Bi - O) and (Ti - O) bonds as well as the contraction of the unit cell.

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