Abstract
A57Fe Mössbauer spectroscopy analysis of the ternary carbide ThFe11C x withx=1.5 and 1.8 has permitted to clearly identify the three different Fe sublattices from their relative abundance. Moreover, direct bonds exist between carbon atoms and iron atoms of one of the three sublattices, yielding a relatively large decrease of the local magnetic moment. A spin reorientation phenomenon (SR), taking place at low temperature, is shown to be of first order type. Both the exchange interactions and magnetocrystalline anisotropy parameters are very sensitive to the carbon stoichiometry. They are analysed for their role on the shifts inT c andT SR respectively.
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le Caer, G., Malaman, B., Isnard, O. et al. Magnetic characterisation of the ternary carbide ThFe11C x (1.5≤x≤2) by57Fe Mössbauer spectroscopy. Hyperfine Interact 77, 221–234 (1993). https://doi.org/10.1007/BF02320314
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DOI: https://doi.org/10.1007/BF02320314