Dresden 2011 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 21: Bio- and Molecular Magnetism II

MA 21.3: Vortrag

Dienstag, 15. März 2011, 11:30–11:45, HSZ 401

Is the magnetic anisotropy barrier U fixed for a given system? — •Claudia Loose and Jens Kortus — TU-BA Freiberg, Institut für Theoretische Physik, Leipziger Str. 23, 09599 Freiberg

We studied several octahedral coordinated, µ_1,1-bridged transition metal dimers by first-principles DFT as implemented in the all-electron NRLMOL code. We have been particulary interested in the magnetic groundstate S and the magnetic anisotropy D of the respective dimers. Our results indicate that the barrier of magnetisation U does not show the expected U=S²|D| behaviour. Instead we observe a steady state behaviour. An increase of the magnetic groundstates is coupled to a decrease of the magnetic anisotropy and hence in a resulting nearly constant barrier U.