Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 49: POSTER II

MA 49.2: Poster

Donnerstag, 19. März 2015, 15:00–18:00, Poster A

Thermodynamic properties of deposited spin clusters — •Felix Kaiser, Henning-Timm Langwald, and Jürgen Schnack — Bielefeld University, Bielefeld, Germany

With regard to future technological applications magnetic clusters have attracted significant interest. Magnetic molecules or other structures of interacting magnetic centers may be deposited on a substrate to utilize the resulting increased addressability. However the resulting coupling to the substrate may also influence the (magnetic) properties of the deposited clusters. Thus the characterization of magnetic clusters deposited on a substrate is of significant importance to their future usage. One may be especially interested in comparing the properties of free and of deposited clusters.

On our poster we present theoretical results for deposited magnetic clusters on a metallic substrate. To describe the magnetic clusters we utilize the Heisenberg Hamiltonian with and without anisotropy while the metallic substrate is described via a band of conduction electrons which is exchange coupled to the magnetic cluster. The calculations are performed by means of the Numerical Renormalization Group method (NRG) which allows us to characterize thermodynamic properties for a wide range of temperatures and in dependence to a magnetic field.