Ion-induced damage accumulation and electron-beam-enhanced recrystallization in SrTiO{sub 3}

Journal Article · Thu Sep 01 00:00:00 EDT 2005 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.72.094112· OSTI ID:20719399

Zhang, Y; Wang, C M; Jiang, W; Weber, W J ^[1]; Lian, J; Ewing, R C ^[2]

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1. Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352 (United States)
2. Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109 (United States)

Damage accumulation in strontium titanate (SrTiO{sub 3}) from 1.0 MeV Au irradiation has been investigated at temperatures from 150 to 400 K. The relative disorder on the Sr and Ti sublattices at the damage peak has been determined as a function of local dose and temperature. A disorder accumulation model has been fit to data from this study and from the literature, indicating that defect-stimulated amorphization is the primary amorphization mechanism up to {approx}360 K. High-dose irradiation at 400 K leads to formation of an amorphous surface layer. Analyses of the temperature dependence for amorphization indicate that the amorphization kinetics are consistent with irradiation-enhanced and thermal recovery processes with activation energies of 0.1{+-}0.05 eV and 0.7{+-}0.1 eV, respectively. Under 200 keV electron-beam irradiation, the epitaxial recrystallization rates are orders of magnitude higher than thermal rates, and an activation energy of 0.1{+-}0.05 eV is determined for the e-beam enhanced recrystallization processes.

• OSTI ID: 20719399
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 72, Issue 9; Other Information: DOI: 10.1103/PhysRevB.72.094112; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
AMORPHOUS STATE
CRYSTAL DEFECTS
ELECTRON BEAMS
EPITAXY
EV RANGE
FERROELECTRIC MATERIALS
GOLD IONS
ION BEAMS
IRRADIATION
KEV RANGE
LAYERS
MEV RANGE
PHYSICAL RADIATION EFFECTS
RECRYSTALLIZATION
STRONTIUM TITANATES
SURFACES
TEMPERATURE DEPENDENCE
THERMAL RECOVERY