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Study of Multicomponent Magnetic Nanostructures with Digital Image Processing Technique.

Published online by Cambridge University Press:  21 February 2011

A. P. Valanju ,
I. S. Jeong ,
D. Y. Kim  and
R. M. Walser
A. P. Valanju
Affiliation:
Department of Electrical and Computer Engineering, University of Texas, Austin, Texas 78712
I. S. Jeong
Affiliation:
Center for Materials Science and Engineering, University of Texas, Austin, Texas 78712
D. Y. Kim
Affiliation:
Department of Electrical and Computer Engineering, University of Texas, Austin, Texas 78712
R. M. Walser
Affiliation:
Department of Electrical and Computer Engineering, University of Texas, Austin, Texas 78712 Center for Materials Science and Engineering, University of Texas, Austin, Texas 78712 J. H. Herring Centennial Professor in Engineering
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Abstract

Previously, we used Digital Image Processing (DIP) to explore the relationships between the growth morphologies of sputtered two-phase nanostructures and their soft magnetic properties [1]. In this work we extended the application of DIP to analyse the effects of deposition parameters and annealing conditions on their soft magnetic properties including disaccommodation.

Magnetically soft, amorphous Co61B39 thin films, exhibiting a two-phase structure, were deposited by sequentially co-sputtering cobalt and boron. We digitized TEM micrographs of these thin films, prepared under different deposition conditions, and subjected to various post deposition processing. Digital Fourier transforms of the TEM micrographs were studied for evidence that the film anisotropy could be correlated with morphological order arising from long and short range interactions between particles over distances of ≈ 0.2 − 1.0 nm.

Our qualitative studies showed that important changes in soft magnetic properties were associated with changes in the two phase morphologies. We determined, for example, that specific morphological changes were associated with the reduction in the magnetic anisotropy produced by annealing. In general, decreases in anisotropy were associated with increased isotropy in Fourier space. The largest reductions and circular symmetric 2D Fourier transforms were produced by rotating field annealing.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 132: Symposium G – Multicomponent Ultrafine Microstructures , 1988 , 173
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

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