Abstract
The electronic and magnetic and magneto-optic properties of the Heusler alloys of CoFeMnSi and CoFeMnAs were investigated by density functional theory. The density of states and magnetic moments were analyzed for both compounds and their magnetic moments obey the Slater-Pauling rule. The X-ray absorption and X-ray magnetic circular dichroism spectra of the constituent transition metals of these Heusler compounds were investigated and the origin of the XMCD spectra in these Heusler compounds was also studied through their density of states. The MOKE studies revealed the highest magnitude of Kerr rotation of 0.21° and 0.12° for CoFeMnAs and CoFeMnSi, respectively.
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