TY  - JOUR
AU  - Ozdogan, K.
AU  - Sasioglu, E.
AU  - Galanakis, I.
TI  - Tuning the magnetic properties of half-metallic semi-Heusler alloys by sp-electron substitution: the case of AuMnSn1-xSbx quaternary alloys
JO  - Journal of physics / D
VL  - 42
SN  - 0022-3727
CY  - Bristol
PB  - IOP Publ.
M1  - PreJuSER-6583
SP  - 085003
PY  - 2009
N1  - Record converted from VDB: 12.11.2012
AB  - We study the electronic and magnetic properties of the quaternary AuMnSn1-xSbx Heusler alloys using first principles calculations. We determine their magnetic phase diagram and show that they present a phase transition from a ferromagnetic (FM) to an antiferromagnetic (AFM) state with increasing Sb concentration. For large Sb concentrations the AFM superexchange coupling dominates over the FM RKKY-like exchange mechanism. This behaviour is similar to that demonstrated by the isovalent Ni1-xCuxMnSb alloy studied recently by the authors (Galanakis et al 2008 Phys. Rev. B 77 214417). Thus the variation of the concentration of the sp-electrons (Sn and Sb atoms) in the AuMnSn1-xSbx compound and the variation of the concentration of the non-magnetic 3d atoms (Cu) in Ni1-xCuxMnSb lead to a similar tuning of the magnetic properties of the two Heusler alloys. We show that the inclusion of correlation effects does not alter the phase diagram of the AuMnSn1-xSbx compound. The calculated results are in good agreement with the available experimental data.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000265248300026
DO  - DOI:10.1088/0022-3727/42/8/085003
UR  - https://juser.fz-juelich.de/record/6583
ER  -