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Analysis of temperature-dependent magnetization in Sm-Fe-C compounds using a two-sublattice model

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1 Author(s)
Liu Zhihui ; Dept. of Phys., Tsinghua Univ., Beijing, China

The temperature dependence of magnetization in Sm3Fe 20Cx (x =0.3, 0.6, 0.8) and Sm2Fe16.5C1.0 intermetallic compounds with rhombohedral structure has been analyzed using molecular field theory. On the basis of a two-sublattice model, the molecular field coefficients are calculated using a numerical fitting method. The Curie temperature and the Fe-Fe, Sm-Fe, Sm-Sm magnetic interaction energies for the compounds are determined from these coefficients. The results show that the increase of the Curie temperature (Tc) with the increase of carbon content x is attributed mainly to the enhancement of the Fe-Fe exchange interaction energy caused by carbon atoms added

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Magnetics, IEEE Transactions on  (Volume:27 ,  Issue: 3 )