Molecular Magnetism

Theoretical studies on magnetism

We are intent on deeply understanding observed properties of magnetic systems under study. To this end we construct case dedicated phenomenological models and solve them, where possible, analytically or numerically by algebraic or Monte Carlo methods for magnetic and thermal characteristics to compare with experiment. The comparisons yield a set of physical parameters providing us with valuable feedback for further studies.

 Recently, a series of isostructural C3-symmetrical triple stranded dinuclear lanthanide [Ln2L3](NO3)3 molecules have been investigated with Ln+3= Tb (1), Dy (2), Ho (3), Er (4), Tm (5), and Yb (6).The temperature dependent and field dependent magnetic properties of 1were modeled using the Hamiltonian comprising the crystal field (CF) term, the super-exchange term and the Zeeman term. The application of the generalized van Vleck formalism enabled the estimation of the CF parameters for the Ln+3 ions within the quasi-symmetrical approximation and the determination of the superexchange coupling constants between the constituent Ln+3 ions in a dimer unit in 1, 2, 3, 4, 5, and 6. [Dalton Trans. 44 (2015) 16833, doi: 10.1039/C5DT02554K]

 

Molecular thin films and nanostructures

Our research concerns two main fields of interest in the molecular magnetism. The first area is related to production and characterisation of molecular nanostructures such as thin films and nanoparticles. The other one pertains to a search for compounds, the properties of which could be controlled by external stimuli such as temperature, light, pressure, adsorbed gas molecules, electric or magnetic field. We pay a special attention to cyanobridged coordination networks based on hexa- and octacyanometallates.