Abstract
Cadmium niobate pyrochlore (Cd2Nb2O7) single crystals have been irradiated at 150, 300, 450 and 600K using 1.0MeV Au2+ ions over fluences ranging from 0.01 to 3.5ions/nm2. The relative disorder on the Cd sublattice in the as-irradiated Cd2Nb2O7 has been analyzed based on in situ 3.0MeV He+ Rutherford backscattering spectrometry along the 〈100〉-axial channeling direction. The results show that the crystal can be readily amorphized under the Au2+ irradiation at or below 450K; however, the relative Cd disorder tends to saturate at 600K, and full amorphization does not occur at doses up to 5dpa. Isochronal annealing (20min) also has been performed at temperatures from 180 to 295K for samples irradiated at 150K. Thermal recovery of the disorder has been observed below room temperature.
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