Berlin 2005 – scientific programme

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MA: Magnetismus

MA 7: Magnetische dünne Schichten II

MA 7.9: Talk

Friday, March 4, 2005, 17:15–17:30, TU H1012

Magnetism of Co and Fe films grown on Pd-monolayer/Cu(001) — •Y. Lu, M. Przybylski, M. Nyvlt, and J. Kirschner — Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle

In order to verify the concept of the Co/Pd interface contribution to the total magneto-optical response from the Co films, a monolayer of Pd was grown by pulsed laser deposition (PLD) on Cu(001) as a template for growth of Co films. Both Co/Pd/Cu(001) and Co/Cu(001) systems prepared under identical conditions have the same slope in the thickness dependence of Kerr rotation. However, a clear increase of the MOKE signal in comparison to the Co films grown directly on Cu(001) is detected. Due to similarity in the structure of Co films on Cu(001) and Pd/Cu(001), any difference in magneto-optical response of both systems could be interpreted as a result of Pd-Co hybridization. When the Pd-buffer layer is thicker than 1 ML, the Kerr rotation from Co is independent of the Pd thickness. This suggests that the second Pd layer does not contribute significantly to the magneto-optical response of the system. A comparison of these Co films on Pd/Cu(001) and Cu(001) is made to the Fe films grown on the same templates. In particular, the sign reversal of the longitudinal Kerr loops with increasing thickness of the Fe films is discussed.