"A rare earth based molecular 1D magnet: synthesis and characterization"
Relatore: Dr. Edoardo Pasca- Kamerlingh Onnes Laboratory, Leiden Universiteit
Note: Seminario di Magnetismo
15 Giugno 2007 ore 15.00
|In molecular magnetism chemists and physicists collaborate very closely
with the common goal of designing, synthesizing, and characterising the
magnetic properties of molecular based materials.
Main technological goal will be to employ molecular magnets in our ordinary
life, for instance in the production of mass memories (very close packed),
in the creation of photo-magnetic materials, in the field of refrigeration
We present here the synthesis and characterization of a molecular chain magnet
based on a rare earth (Lanthanide) and a transition metal (Mo or W) bridged
by organic ligands. A complete thermodynamical study revealed that the
compound behaves like a ferromagnetic Ising chain with 2 spins 1/2 per unit
cell. A brief outlook on the techniques, comprehending specific heat,
magnetization and susceptibility as function of temperature and field, will be
A full understanding of this compound is the first step in the following study
of the whole family of compounds that can be synthetised and that can lead to
the understanding of magnetic interactions, like the d-f superexchange, as
well as the synthetic "art".