Raman scattering study of the effect of A- and B-site substitution on the room-temperature structure of ABi4Ti4O15

3rd International Conference on Functional Materials Science 2016

Prasetyo, A.^1,2 ; Mihailova, B.^3 ; Suendo, V.^1 ; Nugroho, A.A.^4 ; Zulhadjri^5 ; Ismunandar^1

Inorganic and Physical Chemistry Research Group, Faculty Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung

40132, Indonesia^1

Department of Chemistry, Universitas Islam Negeri Maulana Malik Ibrahim, Jl. Gajayana 50, Malang

65144, Indonesia^2

Department Geowissenschaften, Universität Hamburg, Grindelallee 48, Hamburg

20146, Germany^3

Physics of Magnetism and Photonic Group, Faculty Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung

40132, Indonesia^4

Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Kampus Limau Manis, Padang

25163, Indonesia^5

关键词: A-site cations;    B-site cations;    B-site substitution;    Composition structure;    Local structure;    Multiferroic properties;    Stretching modes;    Temperature structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/196/1/012041/pdf
DOI  :  10.1088/1757-899X/196/1/012041

来源: IOP

【 摘 要 】

Aurivillius-type materials exhibit promising ferroelectric and multiferroic properties that can be tailored via chemistry variations in the perovskite block. Hence, it is important to clarify the relations composition-structure, also on a local-scale level. The aim of this contribution is to give further insights into the effect of A- and B-site cations to the room-temperature local structure of Aurivillius four-layered ABi4Ti4O15(A = Sr, Pb, Ba) and Pb1-xBi4+xTi4-xMnxO15(x = 0, 0.2, 0.4) by Raman scattering. The effect of A-site cation to the local structure of perovskite block was identified by the phonon mode near 750 and 870 cm-1arising from BO6stretching. A-site Ba2+, having the largest ionic radius among the considered elements, significantly stiffens the TiO6octahedra, as derived from the fact that the TiO6stretching modes have the highest wavenumber for BaBi4Ti4O15, i.e. the Ti-O bond strength is strongest for this compound. The replacement of Ti4+by Mn3+cation at the B- site also influences the B-O bond. The comparison of the phonon modes near 700 and 870 cm-1in Pb1-xBi4+xTi4-xMnxO15with x = 0, 0.2, and 0.4 shows that the lowest wavenumber, which is due to the elongation of Ti-O bonds is observed for x = 0.4.