Damage accumulation has been investigated in single crystal SrTiO3 (100) irradiated with 1.0 MeV Au2þ by using in situ Rutherford backscattering spectrometry in channeling geometry (RBS/C). Samples were irradiated at temperatures of 170, 300 and 350 K with ion .uences ranging from 0.05 to 0.60 Au2þ/nm2. The in situ RBS/C analysis indicates that the relative disorder in both Sr and Ti sublattices shows a strong sigmoidal dependence on ion dose. After an ion .uence of 0.30 Au2þ/nm2 at 170 K, the buried region at the damage peak (_60 nm) becomes fully amorphous, which corresponds to a dose of _0.39 dpa. For irradiation at 300 and 350 K, ion .uences of 0.40 Au2þ/nm2 (_0.52 dpa) and 0.45 Au2þ/nm2 (_0.59 dpa) are necessary to achieve an amorphous state at the damage peak, respectively.
Revised: May 20, 2004 |
Published: May 16, 2003
Citation
Thevuthasan S., W. Jiang, V. Shutthanandan, and W.J. Weber. 2003.Accumulation of Ion Beam Induced Disorder in Stronium Titanate.Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms 206.PNNL-SA-38128.