HLRB Project pr63fa

Finite-temperature Lanczos simulations of magnetic molecules

Uni Bielefeld, Dept. of Physics

Finite-temperature Lanczos simulations of magnetic molecules

Uni Bielefeld, Dept. of Physics

Uni Bielefeld, Dept. of Physics

Prof. Dr. Jürgen Schnack

Universitätsstr. 25

33615 Bielefeld

The very interesting magnetic properties offrustrated magnetic molecules are often hardly accessible due tothe prohibitive size of the related Hilbert spaces. Thefinite-temperature Lanczos method is able to treat spin systemsfor Hilbert space sizes up to $10^9$. The method was developed byJ. Jaklic and P. Prelovsek (Phys. Rev. B {\bf 49}, 5065) in 1994.It allows to evaluate thermodynamic properties of e.g. magnetic materialsas function of both temperature and applied field with very goodaccuracy. In a recent investigation we have shown that it is wellapplicable to spin models such as the Heisenberg model in orderto describe experimentelly determined properties of magnetic molecules(J. Schnack, O. Wendland, Properties of highly frustrated magnetic molecules studied by the finite-temperature Lanczos method,Eur. Phys. J. B (2010) accepted; arXiv:1009.2889).It could also be shown that the method scales almost perfectly using openMP on SMP architectures.In this project we want to investigate various recently synthesized and interesting magnetic molecules.molecules

Impressum, Conny Wendler