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Precipitation Phenomena in Implanted Ionic Oxide MgO

Published online by Cambridge University Press:  15 February 2011

A. Perez
Affiliation:
Département de Physique des Matériaux,
M. Treilleux
Affiliation:
Département de Physique des Matériaux,
P. Thevenard
Affiliation:
Département de Physique des Matériaux,
G. Abouchacra
Affiliation:
Département de Physique des Matériaux,
G. Marest
Affiliation:
Département de Physique des Matériaux, Institut de Physique Nucléaire, Université C. Bernard Lyon I, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne Cédex - France
L. Fritsch
Affiliation:
Département de Physique des Matériaux,
J. Serughetti
Affiliation:
Département de Physique des Matériaux,
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Abstract

MgO single crystals implanted with alkali ions (Li+, Na+, K+ and Rb+),Fe+, In+ and Au+ ions have been studied after implantation with doses up to 1017 ions.cm−2 and after annealing at temperatures up to 1100°C.In order to characterize defects and precipitated phases, several techniques have been associated depending on the implanted ions : optical absorption, transmission electron microscopy, Rutherford backscattering spectrometry, conversion electron Mössbauer spectroscopy and X-ray diffraction at oblique incidence. Directly after implantation the intrinsic defects in the anionic sublattice (F, F+, F2-centers) and in the cationic sublattice (V-centers) are observed. As to the implanted species, two precipitation processes are observed : (i) the implanted ions precipitate independently of the matrix elements. This is the case of alkali ions which form alkali metal precipitates. (ii) the implanted species precipitate with those of the matrix to form compounds. This is observed with iron which forms oxide precipitates and spinel ferrite. In the case of indium and gold, the precipitation process occurs with the cations of the matrix to form binary alloys : Mg3In and Au3Mg.

Type
Research Article
Copyright
Copyright © Materials Research Society 1982

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References

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