Layer-dependent magnetization in ultrathin Eu films on Gd(0001)

摘要

The magnetic order of ultrathin Eu films on Gd(0001) was studied in a layer-resolved way by magnetic circular dichroism in 4f photoemission in combination with layer-dependent 4f core-level shifts. It was found that Eu films up to 2 monolayers thick show a high net magnetization parallel to that of the Gd substrate, exhibiting a 6×6 reconstruction, while for thicker Eu layers both the superstructure and the ferromagnetic alignment break down. # 1997 American Institute of Physics. S0003-6951 (97)01449-6