Premium
Half metallic ferromagnetism of Mn doped AlSb: A first principles study
Author(s) -
Rahman Gul.,
Cho Sungle,
Hong Soon Cheol
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200777225
Subject(s) - condensed matter physics , fermi level , ferromagnetism , magnetic moment , atom (system on chip) , metal , half metal , spin polarization , doping , materials science , electronic band structure , chemistry , physics , spintronics , electron , quantum mechanics , computer science , metallurgy , embedded system
We employ the spin‐polarized, full potential linearized augmented plane wave (FLAPW) method within generalized gradient approximation (GGA) to study the electriconic and magnetic properties of Al 1–x Mn x Sb (x = 0.25, 0.50, 0.75, and 1.0). We find that Al 1–x Mn x Sb is a half metal ferromagnet. The Fermi level shifts toward high energy with the increase of Mn concentration. At the end composition ( i.e. MnSb) the Fermi level touches the conduction band edge and MnSb is nearly a half met al. The minority spin gap (∼1.0 eV) is robust to the change of Mn concentration. The total magnetic moment per Mn of Al 1–x Mn x Sb is also (4.0 µ B ) independent of the Mn concentration due to its half‐metallicity. The induced magnetic polarization of the nearest Sb atom is antiparallel to that of Mn atom whereas parallel magnetic polarization is found at the Al site. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)