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Characterization of Epitaxial Fe on GaAs(110) by Scanning Tunneling Microscopy

Published online by Cambridge University Press:  03 September 2012

R. A. Dragoset ,
P. N. First ,
Joseph A. Stroscio ,
D. T. Pierce  and
R. J. Celotta
R. A. Dragoset
Affiliation:
National Institute of Standards and Technology, Gaithersburg, MD 20899
P. N. First
Affiliation:
National Institute of Standards and Technology, Gaithersburg, MD 20899
Joseph A. Stroscio
Affiliation:
National Institute of Standards and Technology, Gaithersburg, MD 20899
D. T. Pierce
Affiliation:
National Institute of Standards and Technology, Gaithersburg, MD 20899
R. J. Celotta
Affiliation:
National Institute of Standards and Technology, Gaithersburg, MD 20899
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Abstract

Iron on GaAs(110) comprises an interesting system not only due to small lattice mismatch, 1.4%, but also because of the magnetic properties of the overlayer. In the present work, scanning tunneling microscopy (STM) was used to investigate bcc Fe films in the 0.1 Å to 20 Å thickness range, grown at 300 K and 450 K substrate temperatures. STM images show Volmer-Weber growth with the formation of 3-D Fe islands 20–30 Å in diameter for 0.1–1 Å deposition at 300 K, increasing to 40–50 Å for thicker films. Iron island sizes at low coverage and thin film roughness at higher coverages both show significant dependence upon growth temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 151: Symposium G – Growth, Characterization and Properties of Ultrathin Magnetic Films and Multilayers , 1989 , 193
Copyright
Copyright © Materials Research Society 1989

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References

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