Effect of Mo and W underlayers on ordered phase formation in Fe-Au-Pd multilayer thin films at low temperatures.

Autor: Gulyás S; Department of Solid State Physics, Faculty of Sciences and Technology, University of Debrecen, P.O. Box 400, H-4002, Debrecen, Hungary.; University of Debrecen, Doctoral School of Physics, Debrecen, Hungary., Katona GL; Department of Solid State Physics, Faculty of Sciences and Technology, University of Debrecen, P.O. Box 400, H-4002, Debrecen, Hungary.
Jazyk: angličtina
Zdroj: Heliyon [Heliyon] 2024 Jun 14; Vol. 10 (12), pp. e32865. Date of Electronic Publication: 2024 Jun 14 (Print Publication: 2024).
DOI: 10.1016/j.heliyon.2024.e32865
Abstrakt: Fe-Pd based thin films with Au intermediate layer fabricated on different substrates (SiO 2 , SiO 2 /Mo, SiO 2 /W) were investigated at annealing temperatures up to 460 °C. The samples were deposited by magnetron sputtering and were post-annealed in vacuum. The ongoing processes were investigated by chemical depth profiling and X-ray diffraction. The experimental results showed that the intermediate Au layer always promoted the formation of FePd 3 phase which also showed L1 2 ordered structure except in one case with W underlayer. However, in the samples with Mo buffer but without the Au interlayer the FePd phase formed and L1 0 ordered phase also appeared for one stacking order. Considering the low diffusivity arising from the annealing temperature the processes were explained by grain boundary diffusion induced reaction layer formation. The formation of the ordered FePd phases was interpreted by the stress accumulation due to the different diffusivity of the components, which relaxes by the shift of the grain boundaries and the transformation of swept over regions. It was concluded, that the effect of the Au interlayer is dominant over the effect of the Mo or W buffer layers.
Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(© 2024 The Author(s).)
Databáze: MEDLINE
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