SKM 2021 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 3: Posters Magnetism I

MA 3.12: Poster

Montag, 27. September 2021, 13:30–16:30, P

Impact of the separate variation of the sputter deposition pressure for seed and multilayer growth on the magnetic properties of Co/Pt multilayer films — •Rico Ehrler, Tino Uhlig, and Olav Hellwig — Chemnitz University of Technology, D-09107 Chemnitz, Germany

The pressure during the sputter deposition process greatly influences the structural as well as magnetic properties of Co/Pt multilayer films with perpendicular anisotropy. Already in 2013 Pierce et al. [1] tuned the lateral heterogeneity and structural order in such systems by changing the sputter deposition pressure for both the Pt seed as well as the multilayer simultaneously. By independent pressure variation of seed and multilayer we achieve an even higher degree of control over the magnetic properties. In a later work, a Ta adhesion layer between substrate and seed was used to achieve a highly oriented Pt(111) texture [2]. This is in accordance with our investigation, where the presence of such a layer greatly influences the growth of the seed.

In this study, a high and low deposition pressure was chosen independently for seed and multilayer, leading to 4 different seed/multilayer combinations. We repeated this variation with an added Ta adhesion layer between the substrate and the Pt seed and will highlight the impact of these systematic variations on the structural and magnetic properties.

[1] M. S. Pierce et al, Phys. Rev. B, vol. 87, no. 18, 2013

[2] Yu. Tsema et al., Appl. Phys. Lett., vol. 109, no. 7, 2016