MOCVD of Magnetic 2D Materials

The discovery of long-range magnetic order in atomically thin two-dimensional (2D) materials is a new emerging field promising for future applications in ultra-compact low-power spintronics, memory technologies, neuromorphic computing etc. The family of 2D magnets is rapidly expanding and the van der Waals and non-van der Waals chalcogenides of chromium are emerging as materials with air stability and high temperature magnetic transitions. In this talk, I will present our work on the MOCVD (metal organic chemical vapour deposition) synthesis of different crystal phases of chromium di-chalcogenides and on the characterizations of their magnetic and electronic properties. The synthesis precision, represented by the phase selectivity, is achieved by the combination of the kinetic control of the synthesis and chemistry of the chosen precursors. We demonstrate the phase selectivity of either trigonal prismatic or octahedral phases grown on epitaxial substrates, and we map the magnetic properties at different temperatures. Finally, we demonstrate the integration of 2D chromium dichalcogenides in devices.