1
|
Bidaud C, Berling D, Jamon D, Gamet E, Neveu S, Royer F, Soppera O. Photocrosslinking and photopatterning of magneto-optical nanocomposite sol-gel thin film under deep-UV irradiation. Sci Rep 2021; 11:5075. [PMID: 33658579 PMCID: PMC7930195 DOI: 10.1038/s41598-021-84376-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 01/12/2021] [Indexed: 11/09/2022] Open
Abstract
This paper is aimed at investigating the process of photocrosslinking under Deep-UV irradiation of nanocomposite thin films doped with cobalt ferrite magnetic nanoparticles (MNPs). This material is composed of a hybrid sol-gel matrix in which MNP can be introduced with high concentrations up to 20 vol%. Deep-UV (193 nm) is not only interesting for high-resolution patterning but we also show an efficient photopolymerization pathway even in the presence of high concentration of MNPs. In this study, we demonstrate that the photocrosslinking is based on the free radical polymerization of the methacrylate functions of the hybrid precursor. This process is initiated by Titanium-oxo clusters. The impact of the nanoparticles on the photopolymerization kinetic and photopatterning is investigated. We finally show that the photosensitive nanocomposite is suitable to obtain micropatterns with sub-micron resolution, with a simple and versatile process, which opens many opportunities for fabrication of miniaturized magneto-optical devices for photonic applications.
Collapse
Affiliation(s)
- C Bidaud
- CNRS, IS2M UMR 7361, Université de Haute-Alsace, 68100, Mulhouse, France.,Université de Strasbourg, Strasbourg, France
| | - D Berling
- CNRS, IS2M UMR 7361, Université de Haute-Alsace, 68100, Mulhouse, France. .,Université de Strasbourg, Strasbourg, France.
| | - D Jamon
- Université de Lyon, CNRS, UMR 5516, Institut d'Optique Graduate School, Laboratoire Hubert Curien, Université Jean Monnet, 42023, Saint-Etienne, France
| | - E Gamet
- Université de Lyon, CNRS, UMR 5516, Institut d'Optique Graduate School, Laboratoire Hubert Curien, Université Jean Monnet, 42023, Saint-Etienne, France
| | - S Neveu
- CNRS, Laboratoire de Physicochimie des Electrolytes et Nanosystèmes Interfaciaux, PHENIX, Sorbonne Université, 75005, Paris, France
| | - F Royer
- Université de Lyon, CNRS, UMR 5516, Institut d'Optique Graduate School, Laboratoire Hubert Curien, Université Jean Monnet, 42023, Saint-Etienne, France
| | - O Soppera
- CNRS, IS2M UMR 7361, Université de Haute-Alsace, 68100, Mulhouse, France. .,Université de Strasbourg, Strasbourg, France.
| |
Collapse
|
2
|
Maafa I, Hajjar-Garreau S, Jaafar R, Berling D, Pirri C, Mehdaoui A, Denys E, Florentin A, Garreau G. Room-temperature ferromagnetism of all-epitaxial β-Fe-Ge/diamond-Ge/β-Fe-Ge trilayers. J Phys Condens Matter 2013; 25:256007. [PMID: 23740804 DOI: 10.1088/0953-8984/25/25/256007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report on the first all-epitaxial ferromagnet/inorganic semiconductor/ferromagnet hybrid heterostructure that exhibits (i) a Ge barrier of diamond crystal structure, (ii) room-temperature ferromagnetic electrodes and (iii) very smooth interfaces. Both bottom- and top-Fe-Ge electrodes exhibit tiny in-plane magnetic anisotropies dominated by a magnetocrystalline contribution of six-fold symmetry originating from the hexagonal symmetry of the B82 (Ni2In) β-Fe-Ge phase. A key result is the absence of any magnetic coupling between these soft-magnetic electrodes for Ge barrier thickness as low as ~2.5 nm, which allows us to easily tune the parallel and antiparallel magnetic alignments by applying suitably small magnetic fields. This confirms the beneficial use of H-surfactant in order to drastically reduce the roughness of the Ge barrier, as revealed by our scanning tunneling microscopy and transmission electron microscopy measurements. This new all-epitaxial ferromagnet/semiconductor hybrid system appears, therefore, to be a promising candidate for the realization of magnetic tunnel junctions with a single crystal semiconductor barrier that are fully compatible with Si-based technology.
Collapse
Affiliation(s)
- I Maafa
- Institut de Science des Matériaux de Mulhouse, CNRS-UMR 7361, Université de Haute-Alsace, Mulhouse, France
| | | | | | | | | | | | | | | | | |
Collapse
|
3
|
Belmeguenai M, Tuzcuoglu H, Berling D, Chérif S, Roussigné Y, Devolder T, Westerholt K. Ferromagnetic resonance, transverse bias initial inverse susceptibility and torque studies of magnetic properties of Co 2MnSi thin films. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134018001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|