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Molecular Field Theory Analysis of TbCo3−x Cu x Compounds

  • Selçuk Kervan
  • Nazmiye Kervan
Original Paper
  • 54 Downloads

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.

Keywords

Rare-earth intermetallic compounds Molecular field theory Exchange interactions Ferrimagnetism 

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© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Faculty of Arts and Sciences, Physics DepartmentNevşehir UniversityNevşehirTurkey

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