[en] Magnetic multilayers of the form Co/Ag/CoO, grown on Si₃N₄ substrates, with seed layers of Ag or Ta of various thicknesses were studied. There is a dramatic difference between the exchange fields and between the coercive fields for the differing seed layers such that, for a Ag seed layer, the loop can be fully shifted to one side of zero field whereas, with a Ta seed layer, this behavior is not observed. One important difference in the seed layers is the layer roughness; the Ag seed layer is as much as six times rougher than the Ta layer, as determined by atomic force microscopy

[en] X-ray magnetic circular dichroism (XMCD) measured at T=6 K and μ₀H=5 T on the α-phase Fe-phthalocyanine (FePc) textured thin films shows that the Fe²⁺ ions present an unusually large, highly unquenched m_L=0.53±0.04 μ_B orbital component, with planar anisotropy. The spin m_S=0.64±0.05 μ_B and the intra-atomic magnetic dipolar m_T components were also obtained. The m_L/m_S=0.83 ratio is the largest measured in 3d complexes and compounds. The origin of this unusually high orbital moment is the incompletely filled e_g level lying close to the Fermi energy. This explains the unusually large and positive hyperfine field detected by Moessbauer spectroscopy in FePc. The FePc film strong planar anisotropy inferred from XMCD experiments is fully confirmed by magnetization measurements.