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Crystallization of yttrium-iron garnet (YIG) in thin films: Nucleation and growth aspects

Published online by Cambridge University Press:  01 February 2011

Michael V. Zaezjev
Affiliation:
zaezjev@emt.inrs.ca, INRS, EMT, 1650 bd Lionel Boulet, Varennes, J3X 1S2, Canada
Manda Chandra Sekhar
Affiliation:
manda@emt.inrs.ca, INRS-EMT, Varennes, J3X 1S2, Canada
Marcello Ferrera
Affiliation:
ferreram@emt.inrs.ca, INRS-EMT, Varennes, J3X 1S2, Canada
Luca Razzari
Affiliation:
razzari@emt.inrs.ca, INRS-EMT, Varennes, J3X 1S2, Canada
Barry M Holmes
Affiliation:
b.holmes@elec.gla.ac.uk, University of Glasgow, Glasgow, N/A, United Kingdom
Marc Sorel
Affiliation:
sorel@elec.gla.ac.uk, University of Glasgow, Glasgow, N/A, United Kingdom
David C Hutchings
Affiliation:
dch@elec.gla.ac.uk, University of Glasgow, Glasgow, N/A, United Kingdom
Alain Pignolet
Affiliation:
pignolet@emt.inrs.ca, INRS-EMT, Varennes, J3X 1S2, Canada
Roberto Morandotti
Affiliation:
morandotii@emt.inrs.ca, INRS-EMT, Varennes, J3X 1S2, Canada
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Abstract

We have studied the crystallization of the yttrium - iron garnet (Y3Fe5O12, YIG) polycrystalline phase in thin films fabricated by means of pulsed laser deposition . Films were deposited on MgO substrates in vacuum, in argon, and in oxygen. A subsequent post-deposition heat treatment (annealing) was done at 800°C in air. We have shown that the crystallization of YIG was precluded by co-existent parasitic phases present in the as-deposited films. Specifically, the growth of the parasitic phase needs to be suppressed in order to get a single-phase polycrystalline YIG. Lowering the substrate temperature has been shown to be a simple and efficient way to suppress the growth of parasitic phase and to obtain good quality YIG films after thermal treatment. This procedure has been demonstrated to be successful even when the YIG films were grown in vacuum and their composition was significantly out of stoichiometry.

Type
Research Article
Copyright
Copyright © Materials Research Society 2008

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References

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Crystallization of yttrium-iron garnet (YIG) in thin films: Nucleation and growth aspects
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