Abstract
The structure of thin Fe overlayers on the Co(112̄0) surface has been investigated by low energy electron diffraction (LEED) and by primary-beam diffraction modulated electron emission (PDMEE), as a function of the Fe coverage (6–50 ML) and of the substrate temperature (between room temperature and 300°C). The structure of the layers was the tetragonally distorted bct modification of the equilibrium bcc phase, with the (001)Fe||(112̄0)Co and [11̄0]Fe||[11̄00]Co relationships with the Co substrate. The Fe(001)–Co(112̄0) system exhibits a very large misfit asymmetry in the interface plane. As a consequence, a breakdown of the long-range order occurs in the Fe film along the [11̄00] substrate direction.
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