NiO-like single layer formed on a Ni/Cu(001) thin film revealed by the depth-resolved x-ray absorption spectroscopy

Abstract

The formation of a 1-ML-thick NiO-like layer on a 5.5 ML Ni ultrathin film by Ni deposition on oxygen precovered Cu(001) is revealed by the depth-resolved x-ray absorption spectroscopy, and its magnetic properties are investigated. The surface layer exhibits a NiO-like x-ray absorption spectrum, while the underlying layers show a typical spectrum for a metallic Ni film. An uncompensated spin moment is observed in the NiO-like layer, which is antiparallel to the spin moment in the underlying Ni layers. These results demonstrate a potential to fabricate a sharp interface between ferromagnetic and antiferromagnetic materials.

Effect of Electric Field on Magnetism of Ni Thin Films via Antiferromagnetic NiO

“…Here, very thin Co layer was inserted between the Ni films and the substrate in order to increase the critical thickness for the SRT of Ni. During the Co and Ni deposition, oxygen remains at the surface, resulting in O/Ni/Co/Cu(001) [6,7]. NiO overlayers were then grown by a reactive deposition of Ni in 1 × 10 −4 Pa oxygen, and NiO/Ni/Co/Cu(001) films were prepared.…”

Self-organized chromium oxide monolayers on Fe(001)

“…Preloaded oxygen on surface and subsurface sites has been used for the preparation of twodimensional films of vanadium, niobium, and molybdenum oxides on Cu 3 Au(100) 28 and, more recently, to obtain a sharp interface between a Ni thin film and a single layer of NiO. 29 The well-ordered and defect-free Fe(001)-p(1 × 1)O surface is an ideal template to implement this strategy. [30][31][32][33][34][35][36] The surface is characterized by one oxygen atom per surface unit cell, which can be used as a reservoir for the stabilization of two-dimensional transition metal oxides.…”

Manipulation of magnetic properties of ferromagnetic Ni thin films grown on Cu(001) by antiferromagnetic NiO and effects of voltage application

“…The absorption spectrum for the film without Ni corresponds to that for O=Ni=Cu(001), and is similar to that shown in a previous report. 13) As the NiO thickness increases, it is recognized that the spectral features of NiO in the absorption spectra are more prominent for thicker NiO, as indicated by dashed lines. On the other hand, although the XMCD spectra are small and noisy owing to the relatively sharp spectral features for NiO, which do not exhibit XMCD, the XMCD intensity is maximum at 1-2 nm NiO thickness and decreases with thicker NiO.…”