Regensburg 2010 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 28: Surface or interface magnetism

O 28.6: Vortrag

Dienstag, 23. März 2010, 11:45–12:00, H48

Correlation between stress, intermixing and magnetic anisotropy of Pt/Co/Pt (111) monolayers — •Anita Dhaka, Safia Ouazi, Zhen Tian, Dirk Sander, and Jürgen Kirschner — Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 061120 Halle (Germany)

We present the results of a combined stress, low energy electron diffraction (LEED) and magneto-optical kerr-effect (MOKE) study on the spin reorientation transition (SRT) of Co monolayers (ML) on Pt(111). We observe a SRT from out-of-plane to in-plane with increasing Co thickness at 3 ML at 300 K. The deposition of one layer Pt on top of 5 ML Co induces a SRT from in-plane to out-of plane. Our stress and LEED measurements identify intermixing at the Co/Pt(111) interface [1].Stress measurements reveal a stronger intermixing at 370 K, as compared to growth at 300 K. Co growth at 370 K leads to a shift of the SRT from out-of-plane to in-plane to a larger thickness of 5 ML. Our results suggest that an intermixed Pt-Co interface favors an out-of-plane easy magnetisation direction, whereas a Co-vacuum interface favors an in-plane easy magnetization direction.

[1] O. Robach, C. Quiros, P. Steadman, K. F. Peters, E. Lundgren, J.Alvarez, H.Isern, and S. Ferrer: Phys. Rev. B 65, 054423 (2002)