Optical properties of Ln2Ti2O7 (with Ln = ...
Document type :
Article dans une revue scientifique: Article original
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Title :
Optical properties of Ln2Ti2O7 (with Ln = La to Lu) thin films grown on (110)-SrTiO3 substrates by pulsed laser deposition
Author(s) :
Bayart, Alexandre [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Blach, Jean-Francois [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Huvé, Marielle [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Blanchard, Florent [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Roussel, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Desfeux, Rachel [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Saitzek, Sebastien [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Blach, Jean-Francois [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Huvé, Marielle [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Blanchard, Florent [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Roussel, Pascal [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Desfeux, Rachel [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Saitzek, Sebastien [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Journal title :
Optical Materials
Volume number :
92
Pages :
303-310
Publication date :
2019
HAL domain(s) :
Chimie/Chimie inorganique
English abstract : [en]
Ln2Ti2O7 thin films with Ln = La to Lu were successfully grown on (110)-SrTiO3 substrates by pulsed laser deposition. The microstructure and optical properties of the entire Ln2Ti2O7 series were investigated by X-Ray ...
Show more >Ln2Ti2O7 thin films with Ln = La to Lu were successfully grown on (110)-SrTiO3 substrates by pulsed laser deposition. The microstructure and optical properties of the entire Ln2Ti2O7 series were investigated by X-Ray diffraction, atomic force microscopy, scanning transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy and spectroscopic ellipsometry. For large ionic radii (i.e. Ln3+ = La3+ to Eu3+), the monoclinic/layered-perovskite structure is obtained with epitaxial growth. For smaller ionic radii (i.e. Ln3+ = Tb3+ to Lu3+), the cubic/pyrochlore structure is privileged. We have also observed the growth of a Gd2Ti2O7 polymorphic phase between the stability limit of the two previously described structures. The optical band gap increases when the ionic radius of Ln3+ decreases. Refractive index (n) and extinction coefficient (k) have been calculated over a wavelength range of 260–1500 nm. The low value of the extinction coefficient indicates that these materials are transparent in the visible range and can therefore be used in electro-optics systems in the case of the layered-perovskite structure and more widely as emitting materials in solid-state lasers optically pumped.Show less >
Show more >Ln2Ti2O7 thin films with Ln = La to Lu were successfully grown on (110)-SrTiO3 substrates by pulsed laser deposition. The microstructure and optical properties of the entire Ln2Ti2O7 series were investigated by X-Ray diffraction, atomic force microscopy, scanning transmission electron microscopy coupled with energy-dispersive X-ray spectroscopy and spectroscopic ellipsometry. For large ionic radii (i.e. Ln3+ = La3+ to Eu3+), the monoclinic/layered-perovskite structure is obtained with epitaxial growth. For smaller ionic radii (i.e. Ln3+ = Tb3+ to Lu3+), the cubic/pyrochlore structure is privileged. We have also observed the growth of a Gd2Ti2O7 polymorphic phase between the stability limit of the two previously described structures. The optical band gap increases when the ionic radius of Ln3+ decreases. Refractive index (n) and extinction coefficient (k) have been calculated over a wavelength range of 260–1500 nm. The low value of the extinction coefficient indicates that these materials are transparent in the visible range and can therefore be used in electro-optics systems in the case of the layered-perovskite structure and more widely as emitting materials in solid-state lasers optically pumped.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
ENSCL
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Université de Lille
CNRS
Centrale Lille
Univ. Artois
Collections :
Research team(s) :
Couches minces & nanomatériaux (CMNM)
Matériaux inorganiques, structures, systèmes et propriétés (MISSP)
Matériaux inorganiques, structures, systèmes et propriétés (MISSP)
Submission date :
2019-09-25T15:07:19Z
2019-10-22T08:10:36Z
2023-01-27T09:06:49Z
2019-10-22T08:10:36Z
2023-01-27T09:06:49Z
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