Abstract
Solid phase epitaxial regrowth of the amorphized layer in α-quartz induced by Rb ion implantations has been studied by thermal annealing in air at 800–1200 K. The Rb + ions were implanted at 175 keV to fluences of 1.0×10 16–3.4×10 16 ions/cm 2. The damage profiles and Rb depth distributions were measured by Rutherford backscattering and channeling spectroscopy. Complete epitaxial recrystallization was achieved for the samples implanted with 2.5×10 16 Rb/cm 2 after a 1 h annealing in air at 1173 K. The regrowth process occurs in two steps and has activation energies of E a L=0.6±0.1 and E a H=3.6±0.4 eV. The recrystallization rate was found to increase for increasing implanted Rb fluence. The results are discussed by considering the topological structures and network connectivity of SiO 2.
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