Abstract
The surface structures of iron deposited on a Mo(110) surface have been investigated by reflection high-energy electron diffraction (RHEED), and three kinds of surface structures were observed. Up to 1.0ML of Fe deposition thickneeses, 1 × 1 structure appeared in all substrate temperature range from RT to 1200°C. At thicknesses ranging from 0.5 to 1.0ML, α structure which is the commensurate structure expressed by [31, 02] in matrix notation appeared at 300–550°C. More than 1.0ML, the β structure appeared at 400–800°C. The β structure is also the commensurate structure expressed by [120, 012], exhibiting the same atomic arrangement as bcc(110) surface. In the thickness range beyond 1.0ML, Fe film grew as the Frank–van der Merwe growth mode at room temperature to 400°C and Stranski–Krastanov growth mode from 400 to 800°C, in which the β structure was the first monolayer.
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