Defects in CrAs and related compounds: a route to half-metallic ferrimagnetism

Details Defects in CrAs and related compounds: a route to half-metallic ferrimagnetism Defects in CrAs and related compounds: a route to half-metallic ferrimagnetism

2006-06-12

arxiv.org/abs/cond-mat/0606286v1

Physical Review B Rapid Communications 74, 140408(R) (2006)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.74.140408

Half-metallic ferrimagnetism is crucial for spintronic applications with respect to ferromagnets due to the lower stray fields created by these materials. Studying the effect of defects in CrAs and related transition-metal chalcogenides and pnictides crystallizing in the zinc-blende structure, we reveal that the excess of the transition-metal atoms leads to half-metallic ferrimagnetism. The surplus of these atoms are antiferromagnetically coupled to the transition-metal atoms sitting at the perfect lattice sites. The needed condition to achieve half-metallic ferrimagnetism is to prevent the migration of the $sp$ atoms to other sites and the atomic swaps.

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