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

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Abstract

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 A–B = –3.78 k B while the intra-sublattice superexchange interactions are ferromagnetic with strengths of J A–A = 5.40 k B and J B−B = 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.

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Authors and Affiliations

  1. Department of Physics, Kookmin University, Seoul, 136-702, Korea

    Kun Uk Kang & Chul Sung Kim

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  1. Kun Uk Kang
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  2. Chul Sung Kim
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Correspondence to Chul Sung Kim.

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Kang, K.U., Kim, C.S. The study of superexchange interaction of ordered Li 0.5 Fe 1.0 Rh 1.5 O 4 . Hyperfine Interact 168, 1181–1184 (2006). https://doi.org/10.1007/s10751-006-9420-4

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  • DOI: https://doi.org/10.1007/s10751-006-9420-4

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