Irradiation experiments have been performed for cadmium niobate pyrochlore (Cd2Nb2O7) single crystals at both 150 and 300 K using 1.0 MeV Au2? ions over fluences ranging from 0.01 to 0.10 ions/nm2. In-situ 3.0 MeV He? Rutherford backscattering spectrometry along the -axial channeling direction (RBS/C) has been applied to study the damage states ranging from small defect concentrations to a fully amorphous state. Results show that the crystal can be readily amorphized under the irradiation conditions. Room-temperature recovery of the defects produced at 150 K has been observed, while the defects produced at 300 K are thermally stable at room temperature. Results also indicate that the RBS/C analysis used in this study induced negligible damage in the near-surface regime. In addition, irradiation at and below room temperature using He? and C3? ions leads to surface exfoliation at the corresponding damage peaks.
Revised: November 10, 2005 |
Published: May 16, 2003
Citation
Jiang W., W.J. Weber, S. Thevuthasan, and L.A. Boatner. 2003.Effect of Ion Irradiation in Cadmium Niobate Pyrochlores.Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms 207, no. 1:85-91.PNNL-SA-36676.