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      https://www.ias.ac.in/article/fulltext/pram/074/03/0391-0397

    • Keywords

       

      Magnetic susceptibility; next-nearest-neighbour effects; tetranuclear Fe(II) complexes; antiferromagnetic exchange; plateau.

    • Abstract

       

      The next-nearest-neighbour (NNN) effect in tetranuclear iron(II) complexes of thiacalixarene macrocycles using the isotropic Heisenberg model has been investigated in order to understand its effects on the observed plateau of magnetization. Although NNN effect is generally very weak in these kinds of systems, it was calculated that its response is quite significant to the external perturbations in certain temperature regions. Using the isotropic Heisenberg exchange Hamiltonian, zero-field energy spectra have been calculated for this particular tetranuclear system. The average magnetic moments with and without next-nearest-neighbour interactions were also calculated. In order to verify the calculations, the results were compared with experimental data taken from the literature, whence, it is suggested that observed magnetic behaviour can be improved by taking into account the NNN effect.

    • Author Affiliations

       

      Ali Bayri1 H Gokhan Bakir2 Mustafa Sulu3 Mustafa Karakaplan3

      1. Department of Physics, Arts and Science Faculty, Adiyaman University, Tr-0204 Adiyaman, Turkey
      2. Department of Physics, Arts and Science Faculty, Inonu University, Tr-44280 Malatya, Turkey
      3. Department of Chemistry, Arts and Science Faculty, Inonu University, Tr-44280 Malatya, Turkey
    • Dates

       
  • Pramana – Journal of Physics | News

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