The independent-atom model (IAM) together with partial waves has been used to study the eKect of the absorption potential on the elastic scattering of electrons bythe carbon tetrafluoride molecule in the incident energy range 100-700eV. The atom is represented by an optical potential which is complex, spherically symmetric and energy dependent. The differential, integral elastic and momentum transfer cross sections have been obtained. The present results are in good agreement with the available experimental data.

No abstract

The effect of silica substrate on the exchange-coupled field H ex in NiO/Ni films was examined. Ni film was vacuum-evaporated on a silica substrate, and then it was oxidized thermally in oxygen to form a NiO/Ni double-layered film. In comparison with our previous results of NiO/Ni film on MgO, H ex for silica and MgO substrate showed almost the same behavior. When the substrate temperature was varied during the evaporation of Ni, it was found that the crystal orientation of Ni in the NiO/Ni double-layered film changes, and H ex is almost independent of the Ni crystal orientation.