title: Structural ordering in a silica glass matrix under Mn ion implantation.
abstract: Mn(+)-implanted, amorphous SiO(2) samples were synthesized using pulsed-ion implantation without thermal annealing. The crystal and electronic structures have been studied using x-ray diffraction and synchrotron-based soft x-ray absorption and emission spectroscopy at the Si and Mn L(2,3) edges. We find a combination of small MnO clusters and Si crystallites at shallow depths while tetrahedral Mn coordination is found deeper in the host target. Through a combination of techniques, we find that the implantation process simultaneously decreases the long-range order in the near-surface region and increases order deeper in the SiO(2) host. Our results suggest Mn substitution into Si sites at deep levels catalyzes the formation of α-quartz, providing insight into the complex interactions that determine the local structure around the impurities as well as the overall changes to the crystallinity of implanted SiO(2).
authors.affiliation: Department of Electrophysics, Ural Federal University, 19 Mira Street, Yekaterinburg 620002, Russia. nexcom@list.ru
authors.forename: D A
authors.initials: DA
authors.lastname: Zatsepin
authors.forename: R J
authors.initials: RJ
authors.lastname: Green
authors.forename: A
authors.initials: A
authors.lastname: Hunt
authors.forename: E Z
authors.initials: EZ
authors.lastname: Kurmaev
authors.forename: N V
authors.initials: NV
authors.lastname: Gavrilov
authors.forename: A
authors.initials: A
authors.lastname: Moewes