Dielectric and magnetic behavior of pure and doped clusters
Rolf Schäfer
Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, TU Darmstadt
17:15 - 18:15 Tuesday 04 June 2019 TUG P2 Magnetic (Stern-Gerlach) and electric (Stark) beam deflection experiments in combination
with density functional theory allow to study systematically the influence of the molecular
structure on the magnetic response of pure and doped clusters.
The dielectric properties of the clusters are investigated in order to identify the molecular
structure of the clusters. In the high temperature regime all clusters show exclusively high
magnetic field seeking response and magnetic dipole moments are extracted from the shift of
the molecular beam. At low nozzle temperatures some of the cluster display considerably
broadened beam profiles due to a non-uniform deflection in the magnetic field. The results
reflect the influence of the transition metals chemical environment on the magnetic properties
of atomic domain magnetic nanoalloys. The different ground state spin multiplicities and
coupling of rotational and vibrational degrees of freedom with the spin angular momentum of
isolated clusters of different size apparently cause these variations of spin orientation. This is
discussed qualitatively by taking into account electronic and molecular structure data from
density functional theory calculations of globally optimized host structures encapsulating a
transition metal atom.
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