Abstract
The presence of chlorine in gold is found to modified drastically the growth mode of Au on a Au(111) substrate. Whereas pure gold can grow layer by layer by step flow, contaminated gold is found to make random and/or vacancy islands and to modify the Au(111) herringbone reconstruction structure. The influence of a contaminated gold capping on the magnetic properties of cobalt ultrathin films has been investigated by in situ Magneto Optical Kerr Effect measurements. Surprisingly, the interface anisotropy is found to be of opposite sign as compared to the one of pure gold and thus favoring an in-plane magnetization. [DOI: 10.1380/ejssnt.2010.21]
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