Hyperfine Interactions

, Volume 168, Issue 1–3, pp 1181–1184 | Cite as

The study of superexchange interaction of ordered Li 0.5 Fe 1.0 Rh 1.5 O 4

  • Kun Uk Kang
  • Chul Sung Kim


Li0.5Fe1.0Rh1.5O4 has been studied by X-ray diffraction, Mössbauer spectroscopy. The crystal structure is characterized by the additional reflection (200) that is described by 1:1 ordered structure of Li, Fe at tetrahedral (A) site and can be assigned to the space group F\(\bar{4}\)3m. The lattice constant (a 0) is 8.4348 Å. The temperature dependence of the magnetic hyperfine field is analyzed by the Néel theory of ferrimagnetism. The inter-sublattice superexchange interaction is found to be antiferromagnetic with a strength of J AB = –3.78 k B while the intra-sublattice superexchange interactions are ferromagnetic with strengths of J AA = 5.40 k B and J BB = 7.39 k B . The Debye temperatures of the tetrahedral and octahedral sites are determined to be 388 and 464 ± 3 K, respectively, and the Néel temperature has been found to be 260 ± 3 K.

Key words

Superexchange interaction Mössbauer spectroscopy Debye temperature Lithium ferrites 


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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  1. 1.Department of PhysicsKookmin UniversitySeoulKorea

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