Job offer

European Commission; France; Sur place; EUR 40 000 - 60 000; Plein temps

Résumé du poste

Le GREMAN cherche un chercheur postdoctoral pour étudier la conductivité thermique des matériaux à crossover spin dans le cadre du projet FROSTBIT. Ce rôle implique des techniques avancées telles que le frittage par plasma à basse température, et offre la possibilité d'influencer la recherche sur les matériaux barocaloriques. Les candidats doivent avoir un doctorat et des compétences en mesure de conductivité thermique.

Qualifications

• PhD en sciences des matériaux ou équivalent requis.
• Expérience souhaitable en mesures de conductivité thermique et en Spark Plasma Sintering.
• Bonnes compétences en communication et en rédaction, en anglais.

Responsabilités

• Étudier et optimiser la conductivité thermique des matériaux à crossover spin.
• Mesurer la conductivité thermique avec la méthode laser flash.
• Collaborer sur les conditions de frittage des céramiques composites.

Connaissances

Conductivité thermique

Sintering plasma

Matériaux moléculaires

Communication

Rédaction en anglais

Formation

PhD en sciences des matériaux

Description du poste

Organisation/Company GREMAN (UMR CNRS 7347) Research Field Chemistry » Inorganic chemistry Chemistry » Applied chemistry Researcher Profile Recognised Researcher (R2) Positions Postdoc Positions Country France Application Deadline 6 Jul 2025 - 23:59 (Europe/Paris) Type of Contract Temporary Job Status Full-time Offer Starting Date 1 Oct 2025 Is the job funded through the EU Research Framework Programme? Horizon Europe (other) Is the Job related to staff position within a Research Infrastructure? No

Offer Description

Missions

The mission of the postdoctoral fellow will be to study and optimize the thermal conductivity of spin crossover (SCO) materials for barocaloric applications. The thermal conductivity will be measured with the laser flash method. One of the strategies identified to improve the thermal conductivity is to elaborate,via low temperature Spark Plasma Sintering (SPS),a composite ceramic with the spin crossover compound as a matrix andhighly thermally conducting charges.

Context

This postdoctoral fellow is funded by the European Pathfinder project FROSTBIT (2024-2028). This project is led by ICMCB-CNRS (France), with 5 partners: University of Nancy (France), University of Tours-GREMAN (France), University of Catalunya (Barcelona), Joseph Stephan Institut (Slovenia). Recent publications evidence colossal barocaloric effects in spin crossover molecular complexes [1]. The FROSTBIT project overall objective is to develop the first operative refrigerator based on a radically new solid-state technology by using barocaloric materials in a regenerative cooling device. One of the more specific objectives is to shape spin crossover materials by Spark Plasma Sintering [2] to obtain densified objects with centimetric sizes, study extensively their thermal, mechanical and barocaloric behaviour and explore the optimization of those properties through the preparation of composites ceramics.

[1] K. Lünser, E. Kavak, K. Gürpinar et al. Elastocaloric, barocaloric and magnetocaloric effects in spin crossover polymer composite films. Nat Commun 15, 6171 (2024)
[2] F. Delorme, C. Chen, B. Pignon, F. Schoenstein, L. Perriere, F. Giovannelli. Promising high temperature thermoelectric properties of dense Ba2Co9O14 ceramics. Journal of the European Ceramic Society 37, 7 (2017)

Activities

The project will focus on the sintering conditions of spin crossover composite ceramics by low temperature Spark Plasma Sintering process in collaboration with ICMCB- Bordeaux. The goal is to improve the thermal conductivity of the ceramics. The thermal conductivity will be calculated from thermal diffusivity (laser flash) and heat capacity (DSC) measurements.

Skills

The candidate must hold a PhD in materials science (or equivalent) and have experience in thermal conductivity measurements and/or in Spark Plasma Sintering. Knowledge of molecular materials would be appreciated. Good communication and writing skills, including English, are required.

Work environment

The postdoctoral researcher will work at GREMAN (UMR CNRS 7347) in Blois. GREMAN has a strong expertise in the measurement of thermal transport in solid materials and in different sintering strategies, including Spark Plasma Sintering. More information can be found on our website: https://greman.univ-tours.fr/

Recruitment process:

1) Pre-selection (deadline 6 July 2025): The candidate must send by email to the scientific supervisors the following documents:
- Cover letter (maximum 2 pages);
- Detailed CV;
- Copy of PhD degree;
- Contact of PhD supervisor(s);
- Any other information needed to assess the application.

All applications will be reviewed promptly, and the most promising candidates will be invited to an interview by the scientific directors.

2) Interview with the scientific supervisors (June-July 2025, at GREMAN or remotely): each candidate will have 15 minutes to present their previous experience, followed by a 30-minute discussion.

The candidate must hold a PhD in materials science (or equivalent) and have experience in thermal conductivity measurements and/or in Spark Plasma Sintering. Knowledge of molecular materials would be appreciated. Good communication and writing skills, including English, are required.

Languages ENGLISH Level Excellent

Additional Information

Selection process

1) Pre-selection (deadline 6 July 2025): The candidate must send by email to the scientific supervisors the following documents:
- Cover letter (maximum 2 pages);
- Detailed CV;
- Copy of PhD degree;
- Contact of PhD supervisor(s);
- Any other information needed to assess the application.

All applications will be reviewed promptly, and the most promising candidates will be invited to an interview by the scientific directors.

2) Interview with the scientific supervisors (June-July 2025, at GREMAN or remotely): each candidate will have 15 minutes to present their previous experience, followed by a 30-minute discussion.

Additional comments

Duration: 30 months
Salary: 2800€ to 4000€ gross salary depending on experience