Orbital angular momentum in Co₂MnSn

Abstract

The tight-binding orthogonalised plane-wave (TB OPW) method is used to reproduce the band structures obtained by the SAPW method. The spin-orbit interaction is treated by perturbation theory to calculate the orbital angular momentum of Heusler alloys Co2YZ on the basis of the band structures. The contributions of the orbital angular momentum to the magnetic moment on Co in Cp2YZ are 0.1, 0.07 and 0.025 mu B for Co2MnSn, Co2TiSn and Co2TiAl respectively.