Missions

The main objective of this Post-Doctoral project is to integrate a magnetic layer on BiSbTeSe and to control its magnetization. It is important to note that although perpendicular magnetization anisotropy (PMA) of the ferroelectric layer is preferred for devices, development and quantification of SOT properties can be achieved with in-plane magnetization of the ferroelectric layer. . Here, we propose to use CoFeB, known to promote PMA via interface anisotropy and bulk properties, and which can be used as the free layer of a magnetic tunnel junction. For this project, we propose to integrate a CoFeB layer on a layer of BiSbTeSe developed at LAAS, to structurally and electrically characterize the stacks and to study the influence of a buffer layer (Ti, Pt or Cr) on the properties. of the ferroelectric layer.

Activities

Clean room work including:
- deposition of magnetic layers by sputtering techniques
- structural characterization of layers by SEM, XRD, AFM and TEM
- optical characterization of magnetic properties by MOKE
- fabrication of micro and nano devices
- characterization electrical transport properties: Hall effect

Skills

a PhD in condensed matter physics with experience in microfabrication and structural and electrical characterizations of magnetic materials.

Work Context

The research work will be carried out in the MPN group of LAAS-CNRS under the direction of Dr Sébastien Plissard. The candidate will benefit from the laboratory's state-of-the-art cleanroom environment and the group's extensive knowledge in the areas of topological insulator growth, high mobility materials, nanofabrication and characterization of materials. Potential candidates must demonstrate knowledge or experience in nanotechnology, thin film deposition, materials science, materials characterization and nanofabrication. The position is located in a sector falling under the protection of scientific and technical potential (PPST), and therefore requires, in accordance with regulations, that your arrival be authorized by the competent authority of the MESR.

The position is located in a sector under the protection of scientific and technical potential (PPST), and therefore requires, in accordance with the regulations, that your arrival is authorized by the competent authority of the MESR.

Constraints and risks

Work in a cleanroom environment