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Dynamic annealing study of SiC epilayers implanted with Ni ions at different temperatures

AuthorsGarcía López, J. ; Morilla, Yolanda ; Battistig, Gabor
Issue Date2009
CitationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 267(7): 1097-1100 (2009)
AbstractSiC epilayers grown on 4H-SiC single crystals were implanted with 850 keV Ni+ ions with fluences in the 0.5-9 × 1016 Ni+/cm2 range. Most of the samples were implanted at 450 °C, but for comparison some implantations were performed at room temperature (RT). In addition, a post-implantation annealing was performed in N2 at 1100 °C in order to recover the implantation-induced structural damage. The disorder produced by the implantation at 450 °C and the effect of the post-implantation annealing on the recrystallization of the substrates have been studied as a function of the fluence by Backscattering Spectrometry in channeling geometry (BS/C) with a 3.45 MeV He2+ beam. RT as-implanted samples showed a completely amorphous region which extends until the surface when irradiated with the highest dose, whereas in the case of 450 °C implantation amorphization does not occur. In general, partial recovery of the crystal lattice quality was found for the less damaged samples, and the dynamic recovery of the crystalline structure increases with the irradiation temperature. © 2009 Elsevier B.V. All rights reserved.
Identifiersdoi: 10.1016/j.nimb.2009.01.030
issn: 0168-583X
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