Imaging microspectroscopy of Ni/Fe/Co/Cu(001) using a photoemission microscope
作者： W Kuch , J Gilles , F Offi , S.S Kang , S Imada
DOI: 10.1016/S0368-2048(00)00182-1
关键词: Magnetic moment 、 X-ray magnetic circular dichroism 、 Surface layer 、 Crystallography 、 Magnetic circular dichroism 、 Thin film 、 Spectroscopy 、 Saturation (magnetic) 、 Ferromagnetism 、 Analytical chemistry 、 Materials science
摘要: Abstract The magnetic phases of 0–6 atomic monolayers (ML) Ni/0–14 ML Fe/6 Co/Cu(001) trilayer crossed double wedges are studied by the combination photoelectron emission microscopy and X-ray circular dichroism spectroscopy at Fe L 2,3 edges. This microspectroscopic technique allows extraction local quantitative information. presence three magnetically different thickness regions with effective spin moments per atom 2.5 μ B (below ≈3.5 ML), 0.7 (≈3.5–11 2.0 (above ≈11 ML) is confirmed. At 7–9 thickness, value consistent a ferromagnetic surface layer on top non-ferromagnetic layers. ratio orbital to moment varies between 0.05 for very thin films 0.15 thicker films, if correction saturation effects taken into account. Images asymmetry Ni Co 3 edges show that 5.5 magnetizations have opposite orientations, pointing towards antiferromagnetic coupling across layer.
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