Magnetisation and magnetic anisotropy of ion beam synthesised iron nitride
P Gupta, H Fiedler, S Rubanov, J Kennedy
Journal of Magnetism and Magnetic Materials | ELSEVIER | Published : 2021
We report the effects of implantation-induced-sputtering in determining the true magnetisation of iron nitrides formed by nitrogen implantation into iron films and the changes subsequently observed in their magnetic anisotropy. Iron thin films (40 nm) capped with gold layers were synthesized by ion beam sputtering. Nitrogen was implanted onto the thin film to a dose of 7 × 1016 cm−2. Dynamic ion–solid interaction simulations calculate the average nitrogen concentration within the iron thin films to be 13 at.%. Ion beam analysis was used to evaluate the composition and depth profile of the thin films before and after implantation. Cross-sectional transmission electron microscopy helped in ide..View full abstract
Awarded by Ministry of Business, Innovation and Employment, New Zealand
The authors would like to thank Dr Simon Granville from Robinson Research Institute for his valuable feedback on this work and Mr Chris Purcell from GNS Science for his assistance in carrying out the ion beam analysis work. This research is funded by the Ministry of Business, Innovation and Employment, New Zealand under the research contract RTVU1811 and the MacDiarmid Institute for Advanced Materials and Nanotechnology, funded by the New Zealand Centres of Excellence Fund.