Abstract
In-vacuum surface magneto-optical Kerr effect was used in conjunction with scanning tunneling microscopy and low-energy electron diffraction to study the in-plane magnetic anisotropy of ultra-thin Fe films on a vicinal Mo(110) substrate. A uniaxial anisotropy with the easy axis of magnetization along the [001] direction was found for this system down to nearly 2ML coverage, contradicting the results of recent theoretical calculations. The easy axis of a step-induced anisotropy was found to coincide with the surface step edges.
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