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Investigation of Ti Interstitials in Slightly Reduced Rutile (TiO 2 ) by Means of Channeling Method

1977; Physical Society of Japan; Volume: 42; Issue: 3 Linguagem: Inglês

10.1143/jpsj.42.939

1347-4073

Eiichi Yagi, Akio Kôyama, Hideo Sakairi, Ryukiti R. Hasiguti,

Nuclear materials and radiation effects

To investigate the defect structures of slightly reduced rutile (TiO 2 ) channeling experiments were performed on a slightly reduced specimen and a stoichiometric one with about 6 MeV protons accelerated by a cyclotron. In an angular scan of the backscattering yield of protons from Ti ions with respect to the [001] axial channel, a peak along the [001] direction was observed only in the reduced specimen. By the analysis of the angular scan it was confirmed that main defects in a slightly reduced rutile are Ti interstitial ions. They are located within about 0.4Å of the [001] mid-channel axis. This result supports the interpretation of EPR experiments that a so-called C -center is a Ti interstitial ton.