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The Effects of Annealing on the Structure and Distribution of Charge States of Iron Implanted into A-Al2O, at 77 K

Published online by Cambridge University Press:  25 February 2011

C. J. Mchargue ,
P. S. Sklad ,
J. C. Mccallum ,
C. W. White ,
J. C. Mccallum ,
C.W. White ,
A. Perez  and
G. Marest
C. J. Mchargue
Affiliation:
Oak Ridge National, Laboratory, Oak Ridge, TN 37831-6118
P. S. Sklad
Affiliation:
Oak Ridge National, Laboratory, Oak Ridge, TN 37831-6118
J. C. Mccallum
Affiliation:
Oak Ridge National, Laboratory, Oak Ridge, TN 37831-6118
C. W. White
Affiliation:
Oak Ridge National, Laboratory, Oak Ridge, TN 37831-6118
J. C. Mccallum
Affiliation:
Oak Ridge National, Laboratory, Oak Ridge, TN 37831-6118
C.W. White
Affiliation:
Oak Ridge National, Laboratory, Oak Ridge, TN 37831-6118
A. Perez
Affiliation:
Oak Ridge National, Laboratory, Oak Ridge, TN 37831-6118
G. Marest
Affiliation:
University Claude Bernard-Lyon 1, Villeurbanne Cedex, France
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Abstract

Implantation of iron Into α-Al2O3 at 77 K produces an amorphous state for fluences greater than about 3 × 1016 Fe/cm2. Iron in the as-implanted (amorphous) specimens is distributed among two Fe2+, two Fe4+, and the Fe° states. The conversion electron Mössbauer (CEMS) spectra for a sample containing 7 × 1016 Fe/cm2 show all iron to be converted to Fe3+ after annealing in oxygen for 1 h at 700°C and above. The transmission electron microscopy (TEM) shows the structure to be mostly Y-A120, after the 900°C anneal and all α-Al2O, after the 1100°C anneal.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 157: Symposium A – Beam-Solid Interactions: Physical Phenomena , 1989 , 555
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

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