Irradiation-induced formation of nanoparticles in cadmium niobate pyrochlore

Jiang, W.; Weber, W. J.; Young, J. S.; Boatner, L. A.
January 2002
Applied Physics Letters;1/28/2002, Vol. 80 Issue 4, p670
Academic Journal
Sequential irradiation with 3 MeV He[sup +] and 10 MeV C[sup 3+] ions performed at T=150 K produces two separate amorphous buried layers in cadmium niobate pyrochlore single crystals. Further irradiation at room temperature results in the formation of nanometer-scale particles in the amorphized regions. An ion-cleaving technique was used to facilitate the observation of these nanoparticles by using scanning electron microscopy. Complete granulation with particle sizes ranging from 30 to 150 nm was observed. X-ray energy-dispersive spectrometry analysis indicates that the numerically large population of smaller particles (∼50 nm) contains a high Cd content (∼70%) and the numerically smaller population of larger particles (>100 nm) contains negligible Nb with a Cd-to-O ratio of about 1:0.54.© 2002 American Institute of Physics.


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