Abstract
Bilayers and single layers composed of Co and Cu were formed on MgO(100) substrates as the fundamental unit of the superlattice of Cu and Co. The crystal structure of their films was investigated, with increasing layer thickness of each element, by reflection high-energy electron diffraction observation and X-ray diffraction analysis. If Cu is deposited on MgO(100) first, Cu has the fcc structure and subsequently deposited Co has a metastable fcc structure which is inherited from the crystal structure of the underlying Cu. Cu on hcp-Co has a metastable hcp structure for thin Cu which is inherited from the crystal structure of the underlying Co. The structure of the Cu changes to fcc with increasing Cu layer thickness and the Cu is released from the influence of the substrate.