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Different behaviors of half-metallic ferromagnetism of Cr-doped AlN and InN
Kang, ByungSub,Lee, HaengKi,Kim, KyeongSup,Kang, HeeJae Royal Swedish Academy of Sciences 2009 Physica scripta Vol.79 No.2
<P>The electronic structure and magnetism are studied for the zinc-blende and wurtzite (Al,Cr)N, (Ga,Cr)N and (In,Cr)N by using the full potential linear muffin-tin orbital method. The energy gap (quasi-gap) in Cr-doped wurtzite InN decreases exponentially with increasing the Cr concentration from 0.027 to 0.166. The half-metallicity is retained in the whole range of concentrations considered, whereas for (Al,Cr)N, the half-metallic character disappears at a concentration of 0.166. The Cr magnetic moment in AlN is about 2.12–2.40μ<SUB>B</SUB> Cr atom<SUP>−1</SUP> with changing the Cr concentration, and for Cr in InN, it is a nearly constant value of 3.0 μ<SUB>B</SUB> Cr atom<SUP>−1</SUP>.</P>