Kamel, Marwa ; Mseddi, Souhir ; Njeh, Anouar ; Donner, Wolfgang ; Ben Ghozlen, Mohamed Hédi (2015)
Acoustoelastic effect of textured (Ba,Sr)TiO3 thin films under an initial mechanical stress.
In: Journal of Applied Physics, 118 (22)
doi: 10.1063/1.4936784
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Acoustoelastic (AE) analysis of initial stresses plays an important role as a nondestructive tool in current engineering. Two textured BST (Ba0.65Sr0.35TiO3) thin films, with different substrate to target distance, were grown on Pt(111)/TiO2/SiO2/Si(001) substrate by rf-magnetron sputtering deposition techniques. A conventional “sin2 ψ” method to determine residual stress and strain in BST films by X-ray diffraction is applied. A laser acoustic waves (LA-waves) technique is used to generate surface acoustic waves (SAW) propagating in both samples. Young's modulus E and Poisson ratio ν of BST films in different propagation directions are derived from the measured dispersion curves. Estimation of effective second-order elastic constants of BST thin films in stressed states is served in SAW study. This paper presents an original investigation of AE effect in prestressed Ba0.65Sr0.35TiO3 films, where the effective elastic constants and the effect of texture on second and third order elastic tensor are considered and used. The propagation behavior of Rayleigh and Love waves in BST thin films under residual stress is explored and discussed. The guiding velocities affected by residual stresses, reveal some shifts which do not exceed four percent mainly in the low frequency range.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Kamel, Marwa ; Mseddi, Souhir ; Njeh, Anouar ; Donner, Wolfgang ; Ben Ghozlen, Mohamed Hédi |
| Art des Eintrags: | Bibliographie |
| Titel: | Acoustoelastic effect of textured (Ba,Sr)TiO3 thin films under an initial mechanical stress |
| Sprache: | Englisch |
| Publikationsjahr: | 14 Dezember 2015 |
| Verlag: | American Institute of Physics |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 118 |
| (Heft-)Nummer: | 22 |
| DOI: | 10.1063/1.4936784 |
| Kurzbeschreibung (Abstract): | Acoustoelastic (AE) analysis of initial stresses plays an important role as a nondestructive tool in current engineering. Two textured BST (Ba0.65Sr0.35TiO3) thin films, with different substrate to target distance, were grown on Pt(111)/TiO2/SiO2/Si(001) substrate by rf-magnetron sputtering deposition techniques. A conventional “sin2 ψ” method to determine residual stress and strain in BST films by X-ray diffraction is applied. A laser acoustic waves (LA-waves) technique is used to generate surface acoustic waves (SAW) propagating in both samples. Young's modulus E and Poisson ratio ν of BST films in different propagation directions are derived from the measured dispersion curves. Estimation of effective second-order elastic constants of BST thin films in stressed states is served in SAW study. This paper presents an original investigation of AE effect in prestressed Ba0.65Sr0.35TiO3 films, where the effective elastic constants and the effect of texture on second and third order elastic tensor are considered and used. The propagation behavior of Rayleigh and Love waves in BST thin films under residual stress is explored and discussed. The guiding velocities affected by residual stresses, reveal some shifts which do not exceed four percent mainly in the low frequency range. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung |
| Hinterlegungsdatum: | 19 Jan 2016 11:36 |
| Letzte Änderung: | 29 Jan 2019 08:18 |
| PPN: | |
| Sponsoren: | Authors are grateful the Alexander von Humboldt foundation for financial support. |
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