Formation of epitaxial and textured platinum films on ceramics-(100) MgO single crystals by pulsed laser deposition

Journal Article · Mon Apr 18 04:00:00 EDT 1994 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.111693· OSTI ID:5121367

Narayan, J; Tiwari, P; Jagannadham, K; Holland, O W ^[1]

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1. Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27995-7916 (United States)

We have investigated the formation of textured and epitaxial metallic films on (100) MgO single crystals substrates (lattice constant [ital a]=4.21 A) as a function of deposition temperature during pulsed laser ablation. Platinum ([ital a]=3.92 A) films on MgO with lattice misfit of 7.4% were found to grow epitaxially in the temperature range 500--700 [degree]C. Three-dimensional x-ray diffraction results (theta, phi, and chi scans) show [l angle]100[r angle] epitaxy with the alignment of all three cube axes. Rutherford backscattering and channeling measurements on a film deposited at 700 [degree]C showed a minimum yield of 2.2%, which is very close to the defect-free single crystal value. In the temperature range 200--500 [degree]C both [l angle]100[r angle] and [l angle]111[r angle] textures were observed. The [l angle]111[r angle] oriented (normal to the surface) films were random in the plane of the substrate, whereas [l angle]100[r angle] crystallites were epitaxial. Below 200 [degree]C, only [l angle]111[r angle] crystallites were observed. The [l angle]111[r angle] texture of platinum films is also observed when grown on amorphous substrates such as SiO[sub 2]. The experimental results are normalized with theoretical simulations addressing the minimization of film energy.

• OSTI ID: 5121367
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 64:16; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
ABLATION
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
ELASTIC SCATTERING
ELECTROMAGNETIC RADIATION
ELEMENTS
EPITAXY
LASER RADIATION
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
METALS
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
RADIATIONS
RUTHERFORD SCATTERING
SCATTERING
TRANSITION ELEMENTS
X-RAY DIFFRACTION