Magnetic Exchange Interactions and Supertransferred Hyperfine Fields at ¹¹⁹Sn Probe Atoms in CaCu₃Mn₄O₁₂ Manganite

Abstract:

The hyperfine magnetic interactions of ¹¹⁹Sn probe atoms in the CaCu₃Mn_3.96Sn_0.04O₁₂ double manganite by Mössbauer spectroscopy using magnetic measurements have been investigated. A consistent description of the results obtained in terms of the Weiss molecular field model by taking into account the peculiarities of the local environment of tin atoms has allowed the indirect Cu²⁺OMn⁴⁺ (J_CuMn 51 ± 1 K) and Mn⁴⁺OMn⁴⁺ (J_MnMn 0.6 ± 0.6 K) exchange interaction integrals to be estimated. Based on the KanamoriGoodenoughAnderson model, we show that the magnitude and sign of the intrasublattice exchange integral J_MnMn correspond to both the electronic configuration of the Mn⁴⁺ cations and the geometry of their local crystallographic environment in the compound under study.

• Periodical: Solid State Phenomena (Volume 190)
• Pages: 695-698
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.190.695
• Online since: June 2012
• Authors: V.S. Rusakov, I.A. Presniakov, A.V. Sobolev, Gérard Demazeau, A.M. Gapochka, T.V. Gubaidulina, M.E. Matsnev, O.S. Volkova, A.N. Vasil'ev
• Keywords: ¹¹⁹Sn Mössbauer Spectroscopy, Exchange Interaction, Manganite

References

[1] F. van der Woude, G.A. Sawatzky, Phys. Rev. B 4 (1971) 3159.

[2] A.S. Moskvin, N.S. Ovanesyan, V.A. Trukhtanov, Hyperfine Interact. 3 (1977) 429.

[3] I.A. Presnyakov, K.V. Pokholok, I.G. Minyailova, et al.: Bull. Russ. Acad. Sci. Physics 63 (1999) 1148.

[4] Z. Zeng, M. Greenblatt, J.E. Sunstrom, et al., J. Solid State Chem. 147 (1999) 185.

[5] R. Weht, W.E. Pickett, Phys. Rev. B 65 (2001) 014415.

[6] S. Krupička, Physik der Ferrite und der verwandten magnetischen Oxide, Academia, Prague, 1973, vol. 1 [Russian translation: Mir, Moscow, 1976].

DOI: 10.1007/978-3-322-83522-2