Magnetism of nanoscale Fe islands studied by spin-polarized scanning tunneling spectroscopy

摘要: We have performed low-temperature $(T=15\mathrm{K})$ spin-polarized scanning tunneling spectroscopy of nanoscale Fe islands with a height two atomic layers, grown on stepped W(110) surface and surrounded by closed monolayer (ML) Fe. These are single domain particles up to coverage 1.5 pseudomorphic ML keep an antiferromagnetic out-of-plane ordering far beyond the onset their coalescence. For small we observe reorientation in-plane magnetization between 2 3 nm island width due exchange coupling magnetized ML.