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Amorphization of sapphire induced by swift heavy ions: A two step process

Abstract : Single crystals of α-Al2O3 were irradiated with 0.7 MeV/amu Xe ions at the GANIL accelerator with fluences extending from 5 x 1011 to 2 x 1014 ions/cm2. The samples were characterized by Rutherford Backscattering Spectrometry in Channelling geometry (RBS-C) and surface profilometry for swelling measurements. RBS-C analysis evidence the presence of two incident ion effects on sapphire targets: the creation of partial disorder that saturates at ~40% with a damage cross section of 7 x 10_14 cm2, followed by a complete disorder starting from the surface and appearing at fluence larger than ~1.2 x 1013 ions/cm2. A correlation between relative disorder and swelling is observed. This study is in agreement with the appearance of amorphization of α-Al2O3 at high fluence as observed by Aruga et al. [T. Aruga, Y. Katano, T. Ohmichi, S. Okayasu, Y. Kazumata, Nucl. Instr. Meth. Phys. Res. B 166–167 (2000) 913–919].
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Submitted on : Friday, July 25, 2008 - 11:41:32 AM
Last modification on : Saturday, June 25, 2022 - 9:45:42 AM


  • HAL Id : cea-00306165, version 1


A. Kabir, A. Meftah, J.P. Stoquert, Marcel Toulemonde, Isabelle Monnet. Amorphization of sapphire induced by swift heavy ions: A two step process. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier, 2008, 266, pp.2976-2980. ⟨cea-00306165⟩



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