https://doi.org/10.1140/epjb/e2003-00172-9
Magnetic properties of the cyclic spincluster Fe6:bicine
1
Physikalisches Institut, Universität Karlsruhe (TH), Wolfgang Gaede Strasse 1, 76128 Karlsruhe, Germany
2
2. Physikalisches Institut, Universität Stuttgart, 70550 Stuttgart, Germany
Corresponding author: a bernd@piobelix.physik.uni-karlsruhe.de
Received:
28
October
2002
Revised:
22
February
2003
Published online:
20
June
2003
The magnetic properties of the cyclic compound [ Fe6(bicine)6] LiClO
MeOH are reported. The cluster
Fe6(bicine)6 forms an antiferromagnetically coupled ring structure of FeIII ions. The magnetic susceptibility is
measured between 2 and 300 K and yields the exchange coupling of 
K. The field dependence
of the magnetic moment is studied at 3 and 6 K in magnetic fields up to 5 T. The zero-field splitting of the first
excited spin states with S=2 and 3 are determined by ESR at 94 GHz. The intra-molecular interactions of the
FeIII ions are analyzed and the on-site anisotropy of the FeIII due to the ligand-configuration is determined to
PACS: 33.35.+r – Electron resonance and relaxation / 36.40.-c – Atomic and molecular clusters / 75.20.-g – Diamagnetism, paramagnetism, and superparamagnetism / 75.75.+a – Magnetic properties of nanostructures
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003
