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-DES-24-0071
Thesis topic details
Category
Condensed Matter Physics, chemistry, nanosciences
Thesis topics
Atomistic modelling of magnetic metal alloys : finite-temperature effects
Contract
Thèse
Job description
An accurate modelling of magnetic alloys requires a correct description of thermal effects, such as lattice vibration, thermal expansion together with magnetic excitations and transitions. All these effects are correlated to each other and they strongly impact on the stability of chemical phases and numerous kinetic processes. A proper treatment of the various involved degrees of freedom and their coupling is higly challenging for atomistic modelling and simulations, particularly due to the dependency on temperature and alloy composition.
In this thesis, we aim at developing and applying a multiscale modelling approach to predict thermodynamic and kinetic properties of magnetic metal alloys as a function of temperature.
We will focus on Fe alloys as a representative case. The target properties include the chemical and magnetic phase boundaries, point-defects concentrations, atomic diffusion coefficients and kinetics of precipitation. In order to investigate these properties, we will employ ab-initio density functional theory (DFT), coarse-grained tight-binding (TB) and effective-interaction models (EIM) and Monte Carlo simulations. Besides the methodological advance, the outcome of the thesis will be also very promising from the materials science point of view, due to the multiple technological applications of these alloys, for example, as the basis of steels.
University / doctoral school
Physique et Chimie des Matériaux (ED397)
Sorbonne Université
Thesis topic location
Site
Saclay
Requester
Position start date
01/10/2024
Person to be contacted by the applicant
FU Chu Chun chuchun.fu@cea.fr
CEA
DES/DRMP//S2CM/SRMP
CEA/Saclay, Bat. 520, piece 105A
+33 1 69 08 29 32
Tutor / Responsible thesis director
Amara Hakim hakim.amara@onera.fr
ONERA
LEM
29 avenue de la Division Leclerc 92322 Châtillon Cedex
0146734890
En savoir plus
https://scholar.google.com/citations?user=3XHL7vYAAAAJ&hl=en