Mn and Fe Impurities in MgB_{2}

Details Mn and Fe Impurities in MgB_{2} Mn and Fe Impurities in MgB_{2}

2005-12-28

arxiv.org/abs/cond-mat/0512675v3

Solid State Communications 141, 390-393 (2007)

Physics

Condensed Matter

Materials Science

revised version

Scientific paper

Based on first principles calculations, we show that $Mn$ impurities are magnetic in $MgB_{2}$ due to exchange-splitting of $d_{3z^2-1}$ band and they substantially modify $B$ $p_{\sigma}$ and $p_{\pi}$ bands through hybridization. Thus, $Mn$ impurities could act as strong magnetic scattering centers leading to pair-breaking effects in $MgB_{2}$. In contrast, we find $Fe$ impurities in $MgB_{2}$ to be nearly non-magnetic.

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