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M. Sieberer:
"Magnetism without d-electrons";
Vortrag: Frühjahrstagung des AK Festkörperphysik und 21st General Conf. of the EPS Condensed Matter Division, Dresden/D; 28.03.2006.

On the basis of ab initio calculations employing density functional theory (DFT) we investigate half metallic
ferromagnetism in zinc-blende and wurtzite compounds composed of group I/II metals as cations and group V
elements as anions. We find that the formation of ferromagentic order requires large cell volumes, high ionicity
and a slight hybridization of anion p and cation d states around the Fermi energy. Our calculations show that
a ferromagnetic alignment of the spins is energetically always more stable than simple AF arrangements, which
makes these materials possible candidates for spin injection in spintronic devices. To clarify the conditions for
the flat p-band carrying the magnetism, we present results of a tight binding analysis.