Offres de Post-doctorat

This post-doctorate is part of the ANR SpinodalDesign project. It involves three French groups: the GPM (Groupe de Physique des Matériaux – UMR 6634, host laboratory for this post-doctorate), the UMET in Lille and SIMAP in Grenoble. In the framework of this project, we are developing an original way of achieving high mechanical strength by combining an ultra-fine granular structure and spinodal decomposition. The post-doctoral fellow will conduct a microstructural characterization of new high-performance alloys hardened in this way. Analyses will be carried out mainly by transmission electron microscopy and Atom Probe Tomography. She/he will also strongly interact with two PhD students in their second year.

The post-doctoral fellow will carry out the following tasks:
-    Literature review on the subject.
-    Planning of experiments to be carried out in collaboration with project partners (including PhD students from the two other labs).
-    Sample preparation using SEM/FIB
-    Characterization of samples by TEM, in particular using the ACOM TEM tool.
-    Atom Probe Tomography characterization.
-    Papers and conference presentations.

The following skills are expected:
-    Expertise in physical metallurgy.
-    Strong technical skills in one or more of the following characterization techniques: SEM/FIB, TEM/STEM or APT.
-    Fluency in English.
-    Strong organizational skills and ability to work as part of a team.

The candidate will follow training courses in Atom Probe Tomography (annual international school hosted by the GPM laboratory), and will also be trained in the use of SEM/FIB and TEM/STEM techniques through in-house training courses.

This post-doctorate is part of the ANR SpinodalDesign project. It involves the GPM (host laboratory for this post-doctorate), the UMET in Lille and SIMAP in Grenoble. The GPM (Groupe de Physique des Matériaux, UMR CNRS 6634) is organized into 5 departments: Materials-Ageing-Mechanics, Scientific Instrumentation, Nanosciences, Disordered Systems-Polymers and NanoHealth-Physics. It has a staff of 160, including 60 lecturers/researchers, 30 technical staff and 70 PhD students/postdoctoral fellows/trainees. The laboratory is located on the Rouen Normandy Science and Engineering Campus (Rouen), within the Université de Rouen Normandie and INSA Rouen Normandie (7000m2). The researcher recruited will be attached to the Science and Mechanics of Materials department within the Microstructures team.

Duration: 12 to 18 months (starting the sooner)
How to apply to this offer: https://emploi.cnrs.fr/Offres/CDD/UMR6634-CHRVUR-060/Default.aspx
Contact: williams.lefebvre@univ-rouen.fr
ANR SpinodalDesign ANR-22-CE08-0016-01
 

The search for thermoelectric materials is an active topic, and promising new families such as chalcogenides have emerged in recent years with the figure of merit ZT reaching 1 or above. One of the possible tuning parameters of ZT in chalcogenides containing transition-metal cations is magnetism which can modify the transport parameters through a modification of the band structure and/or a modification of the entropy of the material. The thermal conductivity can also potentially be modified by magnetism. Even if promising interplay between thermoelectric properties and magnetism has already been demonstrated in some oxides and sulfides, a detailed understanding of these phenomena is still lacking. The aim of our project is to investigate the interplay between carriers, spins and phonons in three selected families of chalcogenides, guided by the input from Density Functional Theory (DFT). This will subsequently allow the optimization of the thermoelectric properties of these materials. Beyond studies of the magnetic properties by standard SQUID magnetometry, the magnetism can be investigated at the local scale in iron-based compounds by Mössbauer spectroscopy, a powerful technique to probe oxidation state, spin configuration or magnetic moment direction at a given iron crystallographic site.

 Post-doctoral position (starting from January2024)

The recruited researcher will participate in the implementation and interpretation of Mössbauer spectroscopy results in iron chalgogenides. Candidates must have a Ph.D in Physics, Material Science, Chemistry, or a closely related field. A strong experience in material characterization is required, in particular in Mössbauer spectroscopy. He/she should be autonomous to perform the Mössbauer analyses: preparation of the samples, adaptation of the Mössbauer devices for specific analyses, fitting of the spectra. The successful candidate will be highly motivated, with demonstrated abilities to work in a collaborative environment.

 The duration of the post-doctoral fellowship is 6 months, starting January 2025. This post-doctoral fellowship is granted by the ANR ThermoDFT project.

Contact : Pr Jean Juraszek
Groupe de Physique des Matériaux, 76801 SAINT ETIENNE DU ROUVRAY CEDEX FRANCE

E-mail: jean.juraszek@univ-rouen.fr