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Portail > Offres > Offre UMR7614-EMMJAL-001 - Sonder simultanément les dynamiques magnétiques, électroniques et structurales de films minces magnétiques (F/H) (H/F)

Probing simultaneously magnetization, structural and electronic dynamics in magnetic thin films (F/M)

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : vendredi 8 juillet 2022

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General information

Reference : UMR7614-EMMJAL-001
Workplace : PARIS 05
Date of publication : Friday, June 17, 2022
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 1 October 2022
Proportion of work : Full time
Remuneration : 2200 € - 2700 €
Desired level of education : 5-year university degree
Experience required : 1 to 4 years

Missions

We have a vacant PostDoc position (1 year) for the investigation of ultrafast magnetization dynamics by combining state-of-the-art femtosecond time resolution with nanometer spatial resolution. When exciting a magnetic thin film with an ultra-short optical pulse, the system is suddenly triggered out of equilibrium and the interplay between electrons, spins and phonons is strongly affected. While the ultra-fast dynamics of separate sub-systems have been quite intensively studied, the link between their dynamics is still missing. The goal of this project is therefore to investigate simultaneously the three sub-systems at play during the ultra-fast demagnetization of ferromagnetic thin films. To do so we propose to couple two x-rays techniques that we have successfully developed: time-resolved x-ray resonant magnetic reflectivity and x-ray absorption spectroscopy.

Activities

* Upgrade the existing reflectometer
* Apply for beamtime
* Conduct synchrotron and XFEL beamtimes: preparation, experiment and analyze
* Analyze data and write papers
* Disseminate results (papers and presentations)

Skills

Candidates (f/m) should hold a PhD degree in physics or a related discipline. Strong expertise in magnetism and/or time-resolved condensed matter experiments would be helpful. A demonstrated track record of performing good research with autonomy and enthusiasm is equally important as well as strong written and verbal communication skills.

Work Context

Our research group (Strongly Correlated and Magnetic Materials) is part of the Laboratory of Physical Chemistry - Matter and Radiation (LCPMR), a joint research unit of the Sorbonne Université and the CNRS, which is located on the Pierre et Marie Curie campus in downtown Paris (5th arrondissement). The research groups of the LCPMR are known for their expertise in the application of advanced XUV/X-ray spectroscopies and scattering techniques for the investigation of electronic properties of matter, from atoms and molecules to condensed matter, and their dynamics. Our research group is recognized for its expertise to add spatial resolution to the investigation of ultrafast phenomena by applying resonant X-ray scattering techniques. We are also known for conceiving novel approaches to probe materials with unparalleled accuracy. To realize our time-resolved experiments we have developed strong collaborations with the LOA (Laboratoire d'Optique Appliquée, Palaiseau, France) for all optical and HHG (High Harmonic Generation) experiments; the free electron lasers FLASH (Hambourg, Germany), FERMI (Trieste, Italy) and European XFEL (Schenefeld, Germany) for XUV/X-ray experiments. The PostDoc will benefit from these established collaborations for the realization of his/her research project. He/she will be part of a team consisting of a CNRS research scientist, 2 assistant professors, 1 research engineer, 1 engineer and 3 PhD students.

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