General information
Organisation
The French Alternative Energies and Atomic Energy Commission (CEA) is a key player in research, development and innovation in four main areas :
• defence and security,
• nuclear energy (fission and fusion),
• technological research for industry,
• fundamental research in the physical sciences and life sciences.
Drawing on its widely acknowledged expertise, and thanks to its 16000 technicians, engineers, researchers and staff, the CEA actively participates in collaborative projects with a large number of academic and industrial partners.
The CEA is established in ten centers spread throughout France
Reference
SL-DRF-24-0474
Direction
DRF
Thesis topic details
Category
Condensed Matter Physics, chemistry, nanosciences
Thesis topics
Novel oxynitride based artificial multiferroic oxynitride thin films
Contract
Thèse
Job description
N-doped oxides and/or oxinitrides constitute a booming class of compounds with a broad spectrum of useable properties and in particular for novel technologies of carbon-free energy production and multifunctional sensors. In this research field the search for new materials is particularly desirable because of unsatisfactory properties of current materials. The insertion of nitrogen in the crystal lattice of an oxide semiconductor allows in principle to modulate its electronic structure and transport properties enabling new functionalities. The production of corresponding single crystalline thin films is highly challenging. In this thesis work, single crystalline oxynitride heterostructures will be grown by atomic plasma-assisted molecular beam epitaxy. The heterostructure will combine two N doped layers: a N doped BaTiO3 will provide ferroelectricity and a heavily doped ferrimagnetic ferrite whose magnetic properties can be modulated using N doping to obtain new artificial multiferroic materials better suited to applications. The resulting structures will be investigated with respect to their ferroelectric and magnetic characteristics as well as their magnetoelectric coupling, as a function of the N doping. These observations will be correlated with a detailed understanding of crystalline and electronic structures.
The student will acquire skills in ultra-high vacuum techniques, molecular beam epitaxy, ferroelectric and magnetic characterizations as well as in state-of-the-art synchrotron radiation techniques.
University / doctoral school
Physique en Île-de-France (EDPIF)
Paris Sciences et Lettres
Thesis topic location
Site
Saclay
Requester
Position start date
01/10/2024
Person to be contacted by the applicant
BARBIER Antoine abarbier@cea.fr
CEA
DRF/IRAMIS/SPEC/LNO
Alternative Energies and Atomic Energy Commission CEA/Saclay - DRF/IRAMIS/SPEC/LNO – CNRS UMR 3680, Bât. 772, Orme des Merisiers, F91191 Gif-Sur-Yvette France
01.69.08.39.23
Tutor / Responsible thesis director
BARBIER Antoine abarbier@cea.fr
CEA
DRF/IRAMIS/SPEC/LNO
Alternative Energies and Atomic Energy Commission CEA/Saclay - DRF/IRAMIS/SPEC/LNO – CNRS UMR 3680, Bât. 772, Orme des Merisiers, F91191 Gif-Sur-Yvette France
01.69.08.39.23
En savoir plus
https://iramis.cea.fr/Pisp/137/antoine.barbier.html
https://iramis.cea.fr/spec/LNO/