  Spin gapless semiconductors are known to be strongly affected by structural
disorder when grown epitaxially as thin films. The magnetic properties of
Mn2CoAl thin films grown on GaAs (001) substrates are investigated here as a
function of annealing. This study investigates the atomic-specific magnetic
moments of Mn and Co atoms measured through X-ray magnetic circular dichroism
as a function of annealing and the consequent structural ordering. The results
indicate that the structural distortion mainly affects the Mn atoms as seen by
the reduction of the magnetic moment from its predicted value.
