  The electronic structure of La2NiO4+d, where additional oxygen interstitials
are forming stripes along (1,1,0), are presented. Spin-polarized calculations
show that ferromagnetism on Ni sites is reduced near the stripes and enhanced
far from the stripes. Totally the magnetic moment becomes reduced because of
oxygen interstitials. It is suggested that the oxygen interstitial
concentration in oxygen rich domains in nickelates suppress magnetism and give
multiband metallic domains.
