Graphene Hall-effect sensors for nanoscale magnetic field detection
Duration: 6 months full-time internship
Latest starting date: 04/03/2024
Localisation: LPCNO, INSA Toulouse
135 avenue de Rangueil
This research master's degree project could be followed by a PhD
The Nanomagnetism group at LPCNO specializes in the study of the galvanomagnetic properties of graphene, with the ultimate aim of fabricating ultra-sensitive Hall-effect magnetic sensors based on boron nitride/graphene/boron nitride(hBN) heterostructures. The team has recently developed a comprehensive and novel model for the detailed understanding of the operation of graphene Hall-effect sensors, which has enabled it to significantly improve their performance (Figure) . The group now focuses on using these graphene Hall-effect sensors to measure the static and dynamic magnetic properties of nanometer-sized ferromagnetic (FM) systems. The first area concerns the measurement, particularly at cryogenic temperatures, of highly promising 2D van der Waals FM materials such as CrI3, CrBr3, Cr2Ge2Te6 or FexGeTey , with the perspective of producing graphene/2D FM material spin heterostructures . The second axis concerns the detection of high-frequency magnetic excitations in ferromagnetic dots and spin-wave propagation lines. Proof-of-concept of such detection could lift the technological bottleneck on nanoscale spin-wave detection and pave the way for magnonic devices .
 L. Petit et al., NanoExpress, under review (2023)  C. Gong et al, Nature, 546, 265 (2017)  T. Song et al, Science 360, 1214 (2018)  A. Chumak et al, Nat Com. 5, 4700 (2014)
Areas of expertise:
Graphene, magnetic field sensors, Hall effect, 2D materials, van der Waals heterostructures
Required skills for the internship:
Background in condensed matter physics and nanophysics, aptitude for experimental studies.