Epitaxy of Pt thin films on (001) MgO. 2: Orientation evolution from nucleation through coalescence

Journal Article · Fri Jan 31 23:00:00 EST 1997 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(96)00183-8· OSTI ID:455278

McIntyre, P C; Maggiore, C J; Nastasi, M ^[1]

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1. Los Alamos National Lab., NM (United States). Materials Science and Technology Div.

Orientation selection and microstructural evolution of thin platinum films deposited on to (001) MgO substrates are examined experimentally. The Pt/MgO system is an example of epitaxy in the absence of strong chemical interactions between film and substrate. Platinum films grow in the Volmer-Weber mode of epitaxy, and more than one epitaxial film orientation is possible on (001) MgO depending upon the deposition conditions. Experimental observations of orientation selection during film growth are explained based on film/substrate interface energy and film surface energy minimization. The results indicate that the final microstructure is controlled by grain boundary motion during and after coalescence of the island films.

• OSTI ID: 455278
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 2 Vol. 45; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ELECTRON BEAMS
EPITAXY
EXPERIMENTAL DATA
GRAIN BOUNDARIES
INTERFACES
MAGNESIUM OXIDES
MICROSTRUCTURE
ORIENTATION
PLATINUM
SURFACE ENERGY