Search

Your search keyword '"ANR: 15-IDEX-0004,LUE,Lorraine Université d'Excellence(2016)"' showing total 4 results
Start Over Author "ANR: 15-IDEX-0004,LUE,Lorraine Université d'Excellence(2016)"
4 results on '"ANR: 15-IDEX-0004,LUE,Lorraine Université d'Excellence(2016)"'

1. Epitaxial growth of magnetostrictive TbFe2 films on piezoelectric LiNbO3

Author

Arnaud Hillion, Vincent Polewczyk, Michel Hehn, S. Robert, Karine Dumesnil, Pascal Boulet, Institut Jean Lamour (IJL), Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL), Impact N4S, ANR: 15-IDEX-0004,LUE,Lorraine Université d'Excellence(2016), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and ANR-15-IDEX-0004,LUE,Isite LUE(2015)

Subjects
Materials science, Reflection high-energy electron diffraction, Lithium niobate, TbFe2, 02 engineering and technology, hybrid nanostructures, piezoelectric substrate, Epitaxy, magnetostriction, 01 natural sciences, Crystal, Magnetization, chemistry.chemical_compound, 0103 physical sciences, General Materials Science, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Condensed matter physics, epitaxial growth, Magnetostriction, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Magnetic anisotropy, chemistry, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], 0210 nano-technology, Molecular beam epitaxy
Abstract

International audience; The TbFe2 compound has been deposited by Molecular Beam Epitaxy on Lithium Niobate (LN) substrates with different orientations (LN Z-, 128 Y-and 41 Y-cuts). Despite the challenging growth on these unconventional substrates, crystalline TbFe2 films (as a single orientated domain or with a limited number of orientations) of reasonable structural quality could be obtained after the deposition of a Mo buffer layer. Detailed and combined RHEED and X-ray analysis permitted to unravel the complex Mo and TbFe2 crystal orientations and to reveal common 3D Orientation Relationships (OR) between the different lattices, whatever the initial LN cut. The magnetic properties and especially the magnetic anisotropy have been investigated in taking magnetocrystalline, magnetoelastic and magnetostatic contributions into account. These promising results on the epitaxial growth of hybrid piezoelectric/ magnetostrictive crystalline system constitute an important step towards the control of magnetization via electrically generated static and/or dynamic strains, and towards the development of magnetic sensors based on Surface Acoustic Wave devices.

Published
2019
Full Text
View/download PDF

2. Core/shell rGO/BiOBr particles with visible photocatalytic activity towards water pollutants

Author

Allagui, Lakhdar, Chouchene, Bilel, Gries, Thomas, Medjahdi, Ghouti, Girot, Emilien, Framboisier, Xavier, Amara, Abdesslem Ben Haj, Lavinia, Balan, Balan, Lavinia, Schneider, Raphael, Faculté des Sciences de Bizerte [Université de Carthage], Université de Carthage - University of Carthage, Laboratoire Réactions et Génie des Procédés (LRGP), Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL), Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO), Institut de Science des Matériaux de Mulhouse (IS2M), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), ANR-15-IDEX-0004,LUE,Isite LUE(2015), Faculté des Sciences de Bizerte, Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace, Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Strasbourg (UNISTRA)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Strasbourg (UNISTRA), ANR: 15-IDEX-0004,LUE,Lorraine Université d'Excellence(2016), Balan, Lavinia, ISITE - Isite LUE - - LUE2015 - ANR-15-IDEX-0004 - IDEX - VALID, Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Matériaux et nanosciences d'Alsace, and Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique

Subjects
Materials science, Radical, Oxide, General Physics and Astronomy, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Hydrothermal circulation, Catalysis, law.invention, chemistry.chemical_compound, law, ComputingMilieux_MISCELLANEOUS, [CHIM.MATE] Chemical Sciences/Material chemistry, Graphene, Surfaces and Interfaces, General Chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, Surfaces, Coatings and Films, chemistry, Chemical engineering, 13. Climate action, Photocatalysis, Charge carrier, 0210 nano-technology, Visible spectrum
Abstract

A series of heterostructured photocatalysts associating reduced graphene oxide (rGO) and BiOBr sheets with exposed {001} facets were prepared via a hydrothermal method. TEM experiments demonstrate that rGO deposits at the surface of BiOBr sheets to yield shell/core rGO/BiOBr particles. Under visible light irradiation, the rGO (1%)/BiOBr photocatalyst exhibits the highest activity for the degradation of the Orange II dye and for the removal of acetaminophen. This originates from the increased visible light absorption and from the effective separation of charge carriers in rGO/BiOBr composites. Investigations into the photocatalytic mechanism show that holes in the valence band of BiOBr and superoxide O2 − radicals generated by the photocatalyst are the main species responsible for the oxidation of acetaminophen. The rGO (1%)/BiOBr catalyst was also demonstrated to be of high stability, further highlighting its potential for practical photocatalytic applications.

Published
2019
Full Text
View/download PDF

3. Epitaxial growth of TbFe2 on piezoelectric LiNbO3 Z-cut

Author

Michel Hehn, Pascal Boulet, Vincent Polewczyk, Karine Dumesnil, S. Robert, Arnaud Hillion, Institut Jean Lamour (IJL), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique de la Matière Condensée et Nanostructures (LPMCN), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL), IMPACT N4S, ANR: 15-IDEX-0004,LUE,Lorraine Université d'Excellence(2016), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and ANR-15-IDEX-0004,LUE,Isite LUE(2015)

Subjects
Reflection high-energy electron diffraction, Materials science, business.industry, Lithium niobate, Magnetostriction, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Epitaxy, 01 natural sciences, Piezoelectricity, Magnetization, chemistry.chemical_compound, chemistry, 0103 physical sciences, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Optoelectronics, Coupling (piping), General Materials Science, 010306 general physics, 0210 nano-technology, business, Layer (electronics)
Abstract

International audience; The strongly magnetostrictive TbFe2 compound has been epitaxially grown on Z-cut Lithium Niobate (LiNbO3) substrates after the deposition of various buffer layers (Mo, Ti and Ti/Mo). Detailed and combined RHEED and X-ray analysis permitted to unravel the in-plane and relative Orientation Relationships (OR) of the different materials in the system. Despite the use of different templates with different structural orders, similar final OR are eventually found between the piezoelectric substrate and the magnetic layer. The structural and magnetic properties are analyzed in order to get a TbFe2 layer of optimum quality to build a magnetostrictive/piezoelectric hybrid system with efficient strain mediated coupling. Such systems are of interest for the development of magnetic sensors as well as for the electric control of magnetization.

Published
2020
Full Text
View/download PDF

4. Impact of buffer layer and Pt thickness on the interface structure and magnetic properties in (Co/Pt) multilayers

Author

Mathias Bersweiler, Daniel Lacour, Michel Hehn, Karine Dumesnil, Institut Jean Lamour (IJL), Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL), IMPACT N4S, ANR: 15-IDEX-0004,LUE,Lorraine Université d'Excellence(2016), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), and ANR-15-IDEX-04-LUE,LUE,Lorraine Université d'Excellence(2016)

Subjects
Materials science, Condensed matter physics, Perpendicular magnetic anisotropy, Oxide, 02 engineering and technology, Surface finish, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Induced polarization, Buffer (optical fiber), chemistry.chemical_compound, Dipole, Nuclear magnetic resonance, chemistry, 0103 physical sciences, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], General Materials Science, 010306 general physics, 0210 nano-technology, Anisotropy, Layer (electronics)
Abstract

The influence of Pt thickness on the interface structure (roughness / intermixing) and magnetic properties has been investigated for (Co / Pt) multilayers sputtered on a Pt or a thin oxide (MgO or AlO x ) buffer layer. When Pt thickness increases from 1.2 nm-2.2 nm, we observe that the effective anisotropy increases with the Pt thickness, simultaneously with the decrease of roughness, i.e. the occurrence of sharper interfaces. Perpendicular magnetic anisotropy (PMA) is still achieved on the oxide buffer layers, but with a lower effective anisotropy correlated to more perturbed interfaces. The detailed analysis of the saturation magnetization shows that: (i) M s is significantly enhanced in the case of rough/intermixed interfaces, which is attributed to and discussed in the framework of Pt induced polarization, (ii) the change in volume dipolar anisotropy is the main factor responsible for the reduction of K eff for systems grown on oxides. Beyond the major role of volume dipolar contribution that reduces PMA, a supplemental positive contribution promoting PMA can be invoked for rough interfaces and large M s (deposit on oxide). This contribution is consistent with a dipolar surface anisotropy term and increases for rough interfaces, in contrast to the Néel surface anisotropy. These opposite variations may interestingly lead to an enhanced anisotropy in (Co / Pt) stackings grown on oxides compared to systems deposited on Pt, i.e. with sharper interfaces.

Published
2016
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results