The Effect of Carbon Distribution on the Manganese Magnetic Moment in Bcc Fe-Mn Alloy
First-principles calculations were performed to study the structural, electronic, and magnetic properties of bcc Fe with C impurities alloyed with 2, 3, and 6at.% of Mn. Our results reveal that both manganese concentration and carbon location with respect to Mn affect the Fe-Mn magnetic interaction. With an increase in Mn concentration in bcc Fe-Mn alloy, the local magnetic moment of manganese changes sharply from - 2 to 1ν B near 3at.% Mn, while carbon stabilizes the local ferromagnetic interaction between the nearest Mn atom and the Fe matrix. We demonstrate that the Mn-C interaction is attractive and promotes carbon trapping with a low energy defect configuration. Our results indicate that the Mn-C binding energy strongly depends on the magnetism and the formation of Mn xC clusters is predicted. © 2011 IOP Publishing Ltd.
N. I. Medvedeva et al., "The Effect of Carbon Distribution on the Manganese Magnetic Moment in Bcc Fe-Mn Alloy," Journal of Physics Condensed Matter, Institute of Physics - IOP Publishing, Jan 2011.
The definitive version is available at http://dx.doi.org/10.1088/0953-8984/23/32/326003
Materials Science and Engineering
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