Imaging Spin Reorientation Transitions in Consecutive Atomic Co layers

Details Imaging Spin Reorientation Transitions in Consecutive Atomic Co layers Imaging Spin Reorientation Transitions in Consecutive Atomic Co layers

2005-12-10

arxiv.org/abs/cond-mat/0512220v2

Phys. Rev. Lett. 96, 147202 (2006)

Physics

Condensed Matter

Materials Science

5 pages, 4 figures. Presented at the 2005 ECOSS conference in Berlin, and at the 2005 Fall meeting of the MRS. Accepted for pu

Scientific paper

10.1103/PhysRevLett.96.147202

By means of spin-polarized low-energy electron microscopy (SPLEEM) we show that the magnetic easy-axis of one to three atomic-layer thick cobalt films on ruthenium crystals changes its orientation twice during deposition: one-monolayer and three-monolayer thick films are magnetized in-plane, while two-monolayer films are magnetized out-of-plane, with a Curie temperature well above room temperature. Fully-relativistic calculations based on the Screened Korringa-Kohn-Rostoker (SKKR) method demonstrate that only for two-monolayer cobalt films the interplay between strain, surface and interface effects leads to perpendicular magnetization.

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