Two regimes of ionization-induced recovery in SrTiO3 under irradiation. (December 2019)

• Record Type: Journal Article
• Authors: Weber, William J.; Xue, Haizhou; Zarkadoula, Eva; Zhang, Yanwen
• Is Part Of: Scripta materialia. Number 173(2019)
• Page Start: 154
• Page End: 157
• Publication Date: 2019-12
• Subjects: Rutherford backscattering spectrometry/channeling (RBS) -- Recovery -- Perovskite -- Defects -- Molecular dynamics; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.08.013
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Irradiation of pre-damaged SrTiO3 with 2 MeV He, 1.2 MeV C, 5 MeV C and 12 MeV O ions reveals two regimes of ionization-induced recovery. For C and O ions, with electronic energy loss between 1.6 and 3 keV/nm, recovery cross-sections range from 0.27 to 0.38 nm 2, and molecular dynamics confirms recovery related to ionization-induced thermal spikes via electron-phonon coupling. At lower electronic energy losses, recovery cross-sections decrease to about 5.5 × 10 −4 nm 2 for 2 MeV He ions and 1.0 × 10 −5 nm 2 for 200 keV electrons, which suggests recovery associated with local electronic excitation processes. Graphical abstract: Unlabelled Image