Seminaria Instytutowe

The versality of low dimensional molecular magnets on examples of magnetocaloric effect and magnetic relaxations

by Piotr Konieczny (IFJ PAN)

Europe/Warsaw
Description

Molecular magnets have drawn a strong interest since the nineties of the former century yielding the 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 non-rigidity, host-guest behavior, non-centrosymmetry, chirality, luminescence, among others. The 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 important 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 introduction to field of molecular magnets with focus on modern research of spin-lattice relaxations and magnetocaloric effect. I will describe the most important results from recent years and outline the future plans.