Coordination and chemical effects on the structural, electronic and magnetic properties in Mn pnictides
Abstract
Simple structures of MnX binary compounds, namely hexagonal NiAs and zincblende, are studied as a function of the anion (X = Sb, As, P) by means of the all-electron FLAPW method within local spin density and generalized gradient approximations. An accurate analysis of the structural, electronic and magnetic properties reveals that the cubic structure greatly favours the magnetic alignment in these compounds leading to high magnetic moments and nearly half-metallic behaviour for MnSb and MnAs. The effect of the anion chemical species is related to both its size and the possible hybridization with the Mn states; both contributions are seen to hinder the magnitude of the magnetic moment for small and light anions. Our results are in very good agreement with experiment - where available - and show that the generalized gradient approximation is essential to correctly recover both the equilibrium volume and magnetic moment.
Keywords
Cite
@article{arxiv.cond-mat/0102376,
title = {Coordination and chemical effects on the structural, electronic and magnetic properties in Mn pnictides},
author = {A. Continenza and S. Picozzi and W. T. Geng and A. J. Freeman},
journal= {arXiv preprint arXiv:cond-mat/0102376},
year = {2009}
}
Comments
18 pages and 4 figures, Latex-file, submitted to Phys.Rev.B