
Prof. Fabien Silly
Université Paris-Saclay, France
Title: Structural and Magnetic Properties of 2D organic Films on Metal Surfaces
Abstract:
Magnetism in two-dimensional (2D) materials is the focus of
recent research interest due to the exciting properties emerging at nanoscale
and and the potential of these materials for applications ranging from
spintronics, quantum computing to optical communications. 1–4 Magnetic 2D
organic materials can be engineered taking advantage of the self-assembly of
molecular magnets. The magnetic properties of such 2D materials are expected to
not only depend of the intrinsic magnetic properties of the individual building
blocks but also their arrangement. Controlling the properties of self-assembled
magnetic nanoarchitecture requires a precise assessment of self-assembly processes
as well as a detailed characterization of the material structure combined with
proper magnetic properties characterization..
We selected various flat molecular
magnets, based on porphyrin and beta-diketonato skeleton, to engineer 2D
magnetic films through self-assembly. The organic arrangement are stabilized by
van der Waals interactions or halogen bonds. The complexes have different metal
centers to trigger the appearance of different magnetic properties. We
investigate using Scanning tunneling microscopy (STM) and synchrotron
spectroscopy (XNLD, XMCD) at low temperature. Our measurements reveal that the
nature of the complex metal center as well as the complex arrangement
drastically influence the magnetic properties of the 2D organic films.
Biography: