Seminaria Instytutowe

The versatility of low dimensional molecular magnets

by Piotr Konieczny (IFJ PAN)


Molecular magnets have drawn substantial interest since the nineties of the former century yielding long-range ordered magnets with critical temperature Tc above room temperature. Parallel to this, a new generation of so-called multifunctional magnetic molecular materials emerged, relying on the additional functionalization of molecular spin carriers or networks with other key features, e.g. structural and electronic nonrigidity, host-guest behavior, noncentrosymmetry, chirality, luminescence, among others. Modern coordination chemistry provides a wide scope of functional molecular magnet platforms revealing different coordination dimensionality, from the discrete molecules (0D) through the chain (1D) and layered (2D) sub-structures towards the fully extended (3D) systems. Apart from the fundamental role of local atomic/molecular features of interest (size, symmetry, electron transfer, chirality, electronic properties, etc.), which are essential for the desired properties, in many cases, the target functionality emerges in accordance with their coordination dimensionality. Along the structure-magnetism correlation line, the related fundamental and application-oriented low dimensional properties are slow magnetic relaxation and low-temperature magnetocaloric effect.

The seminar will provide a brief overview of my research in the field of low-dimensional molecular magnets with a focus on magneto-structural correlations, spin-lattice relaxations and the magnetocaloric effect.