Removable capping layer for air-sensitive GdN.

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ID: 101133
2020
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Abstract
The strongly correlated rare earth nitrides display unusual coupled magnetic, electronic and superconducting properties, with predicted topological states. However, their air-sensitiveness has prevented in-depth investigations of their properties. In this paper, we show that a 100 nm thick epitaxial samarium layer provides adequate passivation of 100 nm thick thin films of gadolinium nitride (GdN), the prototypical rare earth nitride, enabling ex-situ magnetic and structural characterizations. Using reflection high-energy electron diffraction, atomic force microscopy and energy dispersive x-ray spectroscopy, we investigate the thermal desorption of the samarium layer under vacuum. We finally demonstrate successful removal of the samarium capping layer in a separate vacuum chamber after exposure to air using a combination of argon ion sputtering and thermal desorption at 400°C, recovering the GdN surface.
Reference Key
le-ster2020removablenanotechnology Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Le Ster, Maxime;Chan, Jay;Ruck, Ben;Brown, Simon A;Natali, Franck;
Journal Nanotechnology
Year 2020
DOI
10.1088/1361-6528/ab82d3
URL
Keywords
capping layer gadolinium nitride molecular beam epitaxy rare-earth nitrides reflection high energy electron diffraction samarium scanning probe microscopy

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