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Portal > Offres > Offre UMR137-JEAGEO-001 - Chercheur (H/F) Croissance d'Isolant Topologique sur un isolant magnétique

Researcher (H/F): Growth of topological insulator materials on ferromagnetic insulators

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

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General information

Reference : UMR137-JEAGEO-001
Workplace : PALAISEAU
Date of publication : Tuesday, November 12, 2019
Type of Contract : FTC Scientist
Contract Period : 12 months
Expected date of employment : 2 December 2019
Proportion of work : Full time
Remuneration : 2400 Euros -2700 Euros gross salary
Desired level of education : 5-year university degree
Experience required : Indifferent

Missions

The objective of the postdoctoral position in collaboration with SPINTEC lab located in Grenoble, will be to develop thin layers of perpendicular magnetic ferrimagnetic insulators to study the growth of topological insulators on these magnetic layers. The development of TI films will be done in collaboration with the SPINTEC laboratory in Grenoble. The objective will be to study how the charge-spin conversion effects in the surface states of the TI allow to act on the magnetization of the magnetic insulator by spin transfer effect. This effect will be optimized, either for magnet reversal in case a uniform magnet configuration is chosen, or for moving chiral domain walls or skyrmions. These studies will be conducted by combining magnetotransport measurements with observation of magnetization dynamics in Kerr microscopy, MFM microscopy or even NV microscopy. The first phase of the project aims to control the growth of thin layers of Tm3Fe5O12 (TmIG) by pulsed laser ablation (PLD) or sputtering. The second phase aims to study the growth of topological insulating materials of the Bi2(TeXSe1-X)3 type in collaboration with Dr. Jamet's team at the Spintec laboratory in Grenoble. The project is part of our general themes of study of the mechanisms of interconnection of charge current to spin current.

Activities

Thin film growth technics by PLD Sputtering or MBE
Structural characterizations (X-ray, AFM etc..)
Magnetic characterizations (SQUID, AGFM, Kerr etc…
Optical lithography
Magnetotransport experiment from 4 K to Room Temperature and for fieldsranging between0 and 9T.

Skills

The candidates must have :
Have extensive knowledge and know-how on growth technics (PLD, Sputtering or MBE)
have extensive knowledge of nanomagnetism and spintronics
- have good knowledge of structural technics characterization
- master standard techniques used for magnetic characterizations
- possessing know-how in nanofabrication techniques
- have a good knowledge of the bibliography on chiral magnetic configurations in spintronic systems
- have a very good level of writing / speaking in English
- be able to synthesize its results and present them in public at conferences and symposiums.
- be able to work in a team

Work Context

The postdoctoral project will take place mainly at the CNRS/Thales Joint Research Unit (UMPhy) in Palaiseau, France. This work is funded under the US TEE project for which meetings every 3 months are organized with other partners and a meeting in the US every 6 months with the funding agency.

Constraints and risks

None

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