Description:

STM image, 35nm x 35nm, showing atomic scale alloying of chromium atoms (small yellow bumps) on an iron (001) surface when chromium atoms are deposited on the iron surface. The two islands are single atomic steps composed of iron atoms that were kicked out of the surface by the deposited chromium atoms. The islands also show alloyed chromium atoms. The chromium atoms reside in an iron lattice site and are a substitutional impurity. The chromium impurities at the iron-chromium interface have a significant effect on magnetic properties of films composed of layers of iron and chromium layers.
 

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