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Molecular Field Theory Analysis of TbCo3−x Cu x Compounds

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Abstract

The molecular field theory based on the two-sublattice model was employed to analyze the temperature dependence of the magnetization and exchange interactions in TbCo3−x Cu x (0≤x≤0.5) compounds. The molecular field coefficients n CoCo, n TbCo and n TbTb were obtained by a numerical fitting process. The exchange coupling constants J CoCo, J TbCo and J TbTb have been calculated by using the molecular field coefficients. The Co–Co exchange energy decreases with increasing x. J CoCo dominates the three kinds of interactions, implying that the magnetic interactions are dominated by the exchange between 3d electrons. The copper substitution has little influence on the Tb–Co exchange interaction.

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Authors and Affiliations

  1. Faculty of Arts and Sciences, Physics Department, Nevşehir University, 50300, Nevşehir, Turkey

    Selçuk Kervan & Nazmiye Kervan

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  1. Selçuk Kervan
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  2. Nazmiye Kervan
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Correspondence to Selçuk Kervan.

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Kervan, S., Kervan, N. Molecular Field Theory Analysis of TbCo3−x Cu x Compounds. J Supercond Nov Magn 24, 819–824 (2011). https://doi.org/10.1007/s10948-010-1025-0

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  • DOI: https://doi.org/10.1007/s10948-010-1025-0

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