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Exafs Studies of Ion Implanted Bismuth1

Published online by Cambridge University Press:  25 February 2011

E. M. Kunoff ,
M. S. Dresselhaus  and
Y. H. Kao
E. M. Kunoff
Affiliation:
Massachusetts Institute of Technology, Department of Physics, Cambridge, MA 02139.
M. S. Dresselhaus
Affiliation:
Massachusetts Institute of Technology, Department of Physics, Cambridge, MA 02139.
Y. H. Kao
Affiliation:
State University of New York at Stony Brook, Department of Physics, Stony Brook, NY 11794.
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Abstract

Magnetorefiection and preliminary Rutherford Backscattering channeling experiments indicate that point defects induced in the bismuth lattice by ion implantation are largely annealed out during the implantation process due to its low melting temperature of 271.3°C. These experiments also show that the implanted ions cause long range strains in the crystal. Single crystal bismuth samples have been implanted at low temperatures (from 273°K down to 77°K) with 75 As to a total fluence of 5 × 1016/cm2 at energies ranging from 50 keV to 200 keV to yield an approximately constant arsenic profile from the sample surface to a depth of 625 Å. To study the local environment of the implanted As ions, EXAFS measurements have been made at the Cornell High Energy Synchrotron Source (CHESS). From these data, we obtain a comparison of the As nearest neighbor distances in samples implanted at different temperatures. We discuss the effect of sample temperature during implantation on these properties. This work represents the first use of EXAFS to characterize annealing of implantation-induced lattice defects during the process of ion implantation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 41: Symposium K – Advanced Photon and Particle Techniques for the Characterization of Defects in Solids , 1984 , 281
Copyright
Copyright © Materials Research Society 1985

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Footnotes

1

Supported by NSF Grant DMR 83-10482.

References

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