Ferromagnetic coupling in an Fe[C(SiMe3)3]2/ferrihydrite hetero-mixture molecular magnet

Ernó Kuzmann, Giorgio Zoppellaro, Jiri Pechousek, Jan Cuda, Zoltán Klencsár, Zoltán Homonnay, Jiri Tucek, Roland Szalay, Mátyás Pápai, Libor Machala, Radek Zboril

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Magnetization and low temperature in-field 57Fe Mössbauer spectroscopy measurements have been performed on a Fe[C(SiMe3)3]2/ferrihydrite hetero-mixture. The results indicate the presence of ferromagnetic coupling of magnetic moments involving Fe[C(SiMe3)3]2 with a hyperfine magnetic field of about 151 T, attributable mainly to the non-frozen atomic orbital contribution. The present findings show the sensitivity of single-ion molecular magnets to local alterations of their lattice-environment and might explain and reconcile some of the differences found in the literature for the observed bulk magnetic properties of the title Fe[C(SiMe3)3]2 compound. The presented Mössbauer spectroscopy and magnetic susceptibility study performed on a Fe[C(SiMe3)3]2/ferrihydrite hetero-mixture showed that the single ion molecular magnet, Fe[C(SiMe3)3]2, displayed an effective magnetic field of 156 T at 5 K in an external magnetic field of 5 T, indicating ferromagnetic coupling in the Fe[C(SiMe3)3]2/ferrihydrite magnetic material.

Original languageEnglish
Pages (from-to)3178-3183
Number of pages6
JournalEuropean Journal of Inorganic Chemistry
Issue number20
Publication statusPublished - Jul 1 2015


  • Iron
  • Magnetic properties
  • Metal-organic frameworks
  • Molecular magnets
  • Mössbauer spectroscopy

ASJC Scopus subject areas

  • Inorganic Chemistry

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    Kuzmann, E., Zoppellaro, G., Pechousek, J., Cuda, J., Klencsár, Z., Homonnay, Z., Tucek, J., Szalay, R., Pápai, M., Machala, L., & Zboril, R. (2015). Ferromagnetic coupling in an Fe[C(SiMe3)3]2/ferrihydrite hetero-mixture molecular magnet. European Journal of Inorganic Chemistry, 2014(20), 3178-3183. https://doi.org/10.1002/ejic.201402033