| In this dissertation, we present results of experiments designed to explore the magnetic properties of clusters, specifically focusing on 4d-transition metal and rare earth metal clusters. We report a non-zero magnetic moment of rhodium 8 to 60-atom clusters. These superparamagnetic rhodium clusters provide the first observation of magnetism in clusters composed of a material which is non-ferromagnetic in the bulk.; Rare earth metal clusters have two distinct magnetic responses which depend on both cluster size and temperature. Certain clusters are superparamagnetic, with a moment which is free to align in an external field, while the rest have magnetic moments which are locked to the cluster lattice. The magnetic moments of all the rare earth clusters are well below the bulk value, but continue to show long-range magnetic ordering above the bulk Curie temperature. The magnetic behavior of both 4d-transition metal and rare earth metal clusters is dependent on the cluster structure. |
