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Elasticity study of textured barium strontium titanate thin films by X-ray diffraction and laser acoustic waves

Chaabani, Anouar and Njeh, Anouar and Donner, Wolfgang and Klein, Andreas and Ben Ghozlen, Mohamed Hédi (2017):
Elasticity study of textured barium strontium titanate thin films by X-ray diffraction and laser acoustic waves.
In: Japanese Journal of Applied Physics, 56 (5), IOP Publishing, pp. 055501, ISSN 0021-4922,
DOI: 10.7567/JJAP.56.055501,
[Online-Edition: https://doi.org/10.7567/JJAP.56.055501],
[Article]

Abstract

Ba0.65Sr0.35TiO3 (BST) thin films of 300 nm were deposited on Pt(111)/TiO2/SiO2/Si(001) substrates by radio frequency magnetron sputtering. Two thin films with different (111) and (001) fiber textures were prepared. X-ray diffraction was applied to measure texture. The raw pole figure data were further processed using the MTEX quantitative texture analysis software for plotting pole figures and calculating elastic constants and Young's modulus from the orientation distribution function (ODF) for each type of textured fiber. The calculated elastic constants were used in the theoretical studies of surface acoustics waves (SAW) propagating in two types of multilayered BST systems. Theoretical dispersion curves were plotted by the application of the ordinary differential equation (ODE) and the stiffness matrix methods (SMM). A laser acoustic waves (LAW) technique was applied to generate surface acoustic waves (SAW) propagating in the BST films, and from a recursive process, the effective Young's modulus are determined for the two samples. These methods are used to extract and compare elastic properties of two types of BST films, and quantify the influence of texture on the direction-dependent Young's modulus.

Item Type: Article
Erschienen: 2017
Creators: Chaabani, Anouar and Njeh, Anouar and Donner, Wolfgang and Klein, Andreas and Ben Ghozlen, Mohamed Hédi
Title: Elasticity study of textured barium strontium titanate thin films by X-ray diffraction and laser acoustic waves
Language: English
Abstract:

Ba0.65Sr0.35TiO3 (BST) thin films of 300 nm were deposited on Pt(111)/TiO2/SiO2/Si(001) substrates by radio frequency magnetron sputtering. Two thin films with different (111) and (001) fiber textures were prepared. X-ray diffraction was applied to measure texture. The raw pole figure data were further processed using the MTEX quantitative texture analysis software for plotting pole figures and calculating elastic constants and Young's modulus from the orientation distribution function (ODF) for each type of textured fiber. The calculated elastic constants were used in the theoretical studies of surface acoustics waves (SAW) propagating in two types of multilayered BST systems. Theoretical dispersion curves were plotted by the application of the ordinary differential equation (ODE) and the stiffness matrix methods (SMM). A laser acoustic waves (LAW) technique was applied to generate surface acoustic waves (SAW) propagating in the BST films, and from a recursive process, the effective Young's modulus are determined for the two samples. These methods are used to extract and compare elastic properties of two types of BST films, and quantify the influence of texture on the direction-dependent Young's modulus.

Journal or Publication Title: Japanese Journal of Applied Physics
Volume: 56
Number: 5
Publisher: IOP Publishing
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Surface Science
11 Department of Materials and Earth Sciences > Material Science > Structure Research
Date Deposited: 07 Apr 2017 08:17
DOI: 10.7567/JJAP.56.055501
Official URL: https://doi.org/10.7567/JJAP.56.055501
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