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Growth behavior and defects in conductive SrRuO3 thin films grown on a Si(100) substrate by sputtering

Published online by Cambridge University Press:  31 January 2011

Sang Ho Oh
Affiliation:
Department of Materials Science and Engineering and Center for Advanced Aerospace Materials (CAAM), Pohang University of Science and Technology (POSTECH), Pohang 790–784, Korea
Chan-Gyung Park
Affiliation:
Department of Materials Science and Engineering and Center for Advanced Aerospace Materials (CAAM), Pohang University of Science and Technology (POSTECH), Pohang 790–784, Korea
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Abstract

The microstructural characteristics of ion-beam-sputtered conductive SrRuO3 films, such as interfacial reactions, which govern growth behavior, defects, and thermal stability, were investigated using transmission electron microscopy. On a Si substrate, two binary constituents of SrRuO3, i.e., SrO and RuO2 were shown to have quite different reaction behaviors. The reduction of the RuO2 constituent to elemental Ru by Si led to an unstable contact of SrRuO3 on the Si substrate. Possible reaction thermodynamics are suggested, which are based on the formation energies of the corresponding reactions. In the case of films grown in an oxygen-deficient atmosphere, stacking faults were observed. The stacking faults originated from twinning on the {111}pc plane to accommodate the oxygen deficiency in the growth atmosphere by changing the arrangement of RuO6 octahedra from corner to one of face sharing.

Type
Articles
Copyright
Copyright © Materials Research Society 2001

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