  Epitaxial thin films of the highly spin polarized Heusler compound
Co2Cr0.6Fe0.4Al are deposited by dc magnetron sputtering. It is shown by XRD
and TEM investigations how the use of an Fe buffer layer on MgO(100) substrates
supports the growth of highly ordered Co2Cr0.6Fe0.4Al at low deposition
temperatures. The as grown samples show a relatively large ordered magnetic
moment of mu = 3.0mu_B/f.u. providing evidence for a low level of disorder.
