Development of an experimental device for microwave and low-temperature magnetotransport M/F

Job Description

Missions

The main mission is to develop the high frequency (Radio/Microwave frequencies) circuit into a recent acquired high vectoral field cryogenic setup in order to measure the high harmonic generation of spin-orbitronics devices excited by a RF magnetic field. More precisely, at the moment the insert for the cryostat is equipped with four 40 GHz cryogenics RF cables.
The selected candidate in a first step will have to develop the holder at the end of the insert in which the sample will be placed and ensure its connection to the incoming RF cables. Secondly, the outstanding selected candidate will have to design the RF on-chip circuit allowing the excitation of the spin-orbitronics device and harvesting the high harmonic signal generated. This part will involve the use of RF simulation software such as Comsol with RF modeling libraries. Finally, She/He will have to develop the RF acquisition chain including signal filtering and amplification for enabling the measurement with a fast oscilloscopes or spectrum analyzer up to 40 GHz (already in the laboratory).

These activities are part of the European project ERC CoG 101086807 MAGNETALLIEN which aim to probe AC detection of spin pumping signal and its high harmonics : https://cordis.europa.eu/project/id/101086807

Activity

The candidate will develop their skills in microwave electronics and instrumentation by building an original and unique experimental device under challenging conditions (extremely low temperatures, limited space, etc.). They will gain initial experience in the field of research, which requires them to demonstrate initiative and creativity.

Your Profil

Skills

The candidate must have a background in RF electronics and instrumentation. She/he should have a good knowledge of RF device technologies, such as RF amplifiers, RF delay lines, mixers, etc. The candidate should also have some experience in radio frequency simulations.
In addition, as the candidate will be interacting with different departments and external companies, fluency in English and in French is necessary.
Good knowledge in LabVIEW or Python is a plus.

Your Work Environment

The Institute Jean Lamour (IJL) is a joint research unit of CNRS and Université de Lorraine.
Focused on materials and processes science and engineering, it covers: materials, metallurgy, plasmas, surfaces, nanomaterials and electronics.
By 2026, IJL has 258 permanent staff (33 researchers, 133 teacher-researchers, 92 IT-BIATSS) and 389 non-permanent staff (146 doctoral students, 43 post-doctoral students / contractual researchers and more than 200 trainees), from some seventy different nationalities.
Partnerships exist with 150 companies and our research groups collaborate with more than XX countries throughout the world.
Its exceptional instrumental platforms are spread over 4 sites ; the main one is located on Artem campus in Nancy.

The selected candidate will work within the SPIN research group, Institute Jean Lamour, under the supervision of Dr. J. Carlos Rojas-Sánchez, and Dr. Sébastien Petit-Watelot. He/she will have to work in collaboration with various laboratory services such as the mechanical workshop, the electronics department and the purchasing service. The purchase of the various pieces of equipment needed to carry out the mission will be covered by the Magnet project funding.
12-month employment contract, renewable for 12 months.

Compensation and benefits

Compensation

3071.50€ gross monthly

Annual leave and RTT

44 jours

Remote Working practice and compensation

Pratique et indemnisation du TT

Transport

Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€

About the offer

About the CNRS

The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.

CNRS

The research professions