Co2MnSn Heusler alloy films were prepared by atomically controlled alternate deposition on MgO(001) substrates. The local magnetism was investigated through the distribution of magnetic hyperfine fields obtained from 119Sn Mossbauer spectroscopic measurements. It turned out that the magnetic environments around the Sn sites in the films prepared by this method with appropriate growth temperatures are relatively uniform in comparison with those in bulk alloys prepared by arc melting. The Mossbauer spectroscopy was applied also to Co2MnSn/MgO/Co2MnSn/Co layered structures and Co2MnSn/Ag multilayers to examine crystallographic uniformity of the Co2MnSn layers and possibility of magnetic anomaly at the interface regions.
