Orientation selection and microstructural evolution of epitaxial platinum films on (001) magnesium oxide

Conference · Sat Dec 31 23:00:00 EST 1994

OSTI ID:6722243

McIntyre, P C; Maggiore, C J; Natasi, M

Thin platinum films were deposited at several different deposition rates and with varying thickness on (001)-cut MgO single crystal substrates by electron beam evaporation. A mixture of two epitaxial Pt orientations were detected in the films by X-ray diffraction and planar ion channeling experiments: (001)[100]Pt // (001)[100]MgO (the [open quotes]cube-on-cube[close quotes] orientation) and (111)[110]Pt // (001)[110]MgO. The effect of deposition rate on film orientation indicated the (111)Pt orientation was preferred under conditions of high driving force for nucleation. The volume fraction of the films occupied by the (111) orientation increased with nominal film thickness, at a constant substrate temperature and deposition rate. This result indicates crystallites having the (111)Pt orientation grew more quickly following nucleation than the (001). The mosaic spread of the Pt orientation decreased markedly as the nominal film thickness increased from [approximately] 1.5 nm (isolated islands) to 20 nm (continuous film).

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6722243
• Report Number(s): LA-UR-94-4052; CONF-941144--3; ON: DE95003680
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHANNELING
COATINGS
DEPOSITION
ELECTRO-OPTICAL EFFECTS
ELEMENTS
ENERGY BEAM DEPOSITION
ENERGY BEAM DEPOSITION FILMS
FILMS
ION CHANNELING
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METALS
MICROSTRUCTURE
ORIENTATION
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
SUBSTRATES
SURFACE COATING
TRANSITION ELEMENTS