Accumulation and Recovery of Disorder in Au2+-Irradiated Cd2Nb2O7

Journal Article · Thu Dec 01 00:00:00 EST 2005 · Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms

DOI:https://doi.org/10.1016/j.nimb.2005.07.046· OSTI ID:876882

Jiang, Weilin; Weber, William J; Boatner, Lynn A

Cadmium niobate pyrochlore (Cd2Nb2O7) single crystals have been irradiated at 150, 300, 450 and 600 K using 1.0 MeV Au2+ ions over fluences ranging from 0.01 to 3.5 ions/nm2. The relative disorder on the Cd sublattice in the as-irradiated Cd2Nb2O7 has been analyzed based on in-situ 3.0 MeV 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 450 K; however, the relative Cd disorder tends to saturate at 600 K, and full amorphization does not occur at doses up to 5 dpa. Isochronal annealing (20 min) also has been performed at temperatures from 180 to 295 K for samples irradiated at 150 K. Thermal recovery of the disorder has been observed below room temperature.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 876882
• Report Number(s): PNNL-SA-42976; 3448; KC0201020; TRN: US0601428
• Journal Information: Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms, Vol. 241, Issue 1-4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CADMIUM OXIDES
NIOBIUM OXIDES
GOLD IONS
IRRADIATION
PYROCHLORE
RUTHERFORD BACKSCATTERING SPECTROSCOPY
THERMAL RECOVERY
ORDER-DISORDER TRANSFORMATIONS
Ion irradiation
lattice disorder
ion channeling
pyrochlores
Environmental Molecular Sciences Laboratory