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Ion beam assisted deposition of textured magnesium oxide templates on un-buffered glass and silicon substrates

Published online by Cambridge University Press:  01 January 2006

Ronald N. Vallejo  and
Judy Z. Wu
Ronald N. Vallejo
Affiliation:
Department of Physics and Astronomy, The University of Kansas, Lawrence, Kansas 66045
Judy Z. Wu*
Affiliation:
Department of Physics and Astronomy, The University of Kansas, Lawrence, Kansas 66045
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Biaxially textured magnesium oxide (MgO) templates of 10-nm thickness were successfully fabricated on glass and silicon substrates without any buffer layers using Ar+ ion beam assisted e-beam evaporation. With an additional layer of 100 nm homoepi MgO on top, the in-plane misorientation of ∼6.5° and out-of-plane misorientation of ∼2.0° have been obtained. Prior to growth, the substrates were bombarded with the same Ar+ ion beam for a certain period ranging from 5 to 35 min to provide initial substrate conditions for textured MgO formation. The ion beam induced modification of the substrate surface morphology was characterized using atomic force microscopy. Reduced surface roughness Ra from 2 to 3 nm on the original glass substrates to below 1.0 nm after 5 min ion beam bombardment was found to be an important condition for the textured MgO formation. The nearly unchanged Ra ≤ 1 nm of the silicon substrate after the ion beam bombardment, however, suggests that additional surface modification is required for the textured MgO to form.

Keywords

Ion beam assisted depositionFilmTexture
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 1 , January 2006 , pp. 194 - 198
Copyright
Copyright © Materials Research Society 2006

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