Electronic states in Cu₂MnX (X = Al, In and Sn) Heusler alloy studied by XMCD and multiple scattering calculations

X-ray magnetic circular dichroism (XMCD) has been measured at Mn and Cu K-edge in Cu₂MnX (X = Al, In, and Sn) Heusler alloy. The Mn K-edge spectrum shows a dispersion-type profile and the Cu K-edge resembles the Mn spectrum, which suggests that polarization of the p unoccupied bands originates commonly in Mn 3d states. To reproduce the observed spectrum by full multiple scattering calculations, Madelung potential has been taken into account. Charge redistribution is an important factor for the electronic structure in Cu₂MnX Heusler alloy.