Study of the features of BaF2 heteroepitaxy on CaF2/Si(100) layers obtained in the high-temperature growth mode

The surface morphology of BaF2 epitaxial films grown by MBE (molecular beam epitaxy) in various modes on the surface of CaF2/Si(100) is investigated by AFM. The CaF2 layers on Si(100) are obtained in the high-temperature growth mode (Т S = 750°C). It is shown that the epitaxy of BaF2 at a temperature of 600°C at the initial stage of growth leads to the formation of defects such as perforations in the epitaxial film, while epitaxy at a temperature of 750°C provides a defect-free film with a surface morphology suitable for the subsequent growth of semiconductors of IV–VI type and solid solutions based on them.