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Magnetic properties of the cyclic spincluster Fe6:bicine

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Abstract:

The magnetic properties of the cyclic compound [Fe6(bicine)6] LiClO4 . 2MeOH are reported. The cluster Fe6(bicine)6 forms an antiferromagnetically coupled ring structure of Fe III ions. The magnetic susceptibility is measured between 2 and 300 K and yields the exchange coupling of J/k B = - 27.5±0.5 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 Fe III ions are analyzed and the on-site anisotropy of the Fe III due to the ligand-configuration is determined to d /k B = - 0.633±0.008K.

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Authors and Affiliations

  1. Physikalisches Institut, Universitä:t Karlsruhe (TH), Wolfgang Gaede Strasse 1, 76128 Karlsruhe, Germany, , , , , , DE

    B. Pilawa, I. Keilhauer & G. Fischer

  2. 2. Physikalisches Institut, Universität Stuttgart, 70550 Stuttgart, Germany, , , , , , DE

    S. Knorr, J. Rahmer & A. Grupp

Authors
  1. B. Pilawa
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  2. I. Keilhauer
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  3. G. Fischer
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  4. S. Knorr
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  5. J. Rahmer
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  6. A. Grupp
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Received 28 October 2002 / Received in final form 22 February 2003 Published online 20 June 2003

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ID="a"e-mail: bernd@piobelix.physik.uni-karlsruhe.de

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Pilawa, B., Keilhauer, I., Fischer, G. et al. Magnetic properties of the cyclic spincluster Fe6:bicine. Eur. Phys. J. B 33, 321–330 (2003). https://doi.org/10.1140/epjb/e2003-00172-9

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  • DOI: https://doi.org/10.1140/epjb/e2003-00172-9

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