Orientation selection in thin platinum films on (001) MgO

Abstract

Orientation selection in platinum films of ∼20 nm thickness deposited onto (001) MgO substrates by e-beam evaporation was investigated through ion beam channeling and x-ray diffraction. A mixture of crystallites having (111) and (001) orientation was observed in Pt films deposited over a range of substrate temperatures from 25 to 700 °C, with the (111) orientation dominant at low temperatures. The (111) orientation was present in these evaporated films at significantly higher substrate temperatures than reported for Pt films deposited by sputtering or pulsed laser deposition. Both orientations had strongly preferred in-plane orientations: [110] Pt//[110] MgO for the (001)-oriented crystallites and [110]Pt//[110] MgO for the (111). The orientation selection process was rationalized based on the expected relative interfacial energies for these two orientations.

Strain relaxation in epitaxial Pt films on (001) SrTiO3

“…1-3 The growth of epitaxial, ͑001͒-oriented Pt films, although more challenging, is possible on ͑001͒ MgO substrates. [4][5][6] The deposition conditions during the subsequent growth of perovskite films on ͑001͒ Pt/MgO must, however, be carefully controlled to avoid the formation of ͑111͒-oriented Pt. 5 Furthermore, nanosized hillocks form for all but the thinnest Pt films on this substrate.…”

In Situ Oxidation Study of Pt Nanoparticles on MgO(001)

“…Apart from the cube-on-cube epitaxy -referred to as [ [57][58][59][60][61][62][63][64][65] . Here we make use of the same notation for the different particle epitaxies as employed in 57 .…”

Effect of different buffer layers on the microstructure and dielectric properties of BaTiO3 thin films grown on Si substrates

“…It is reported that when the temperature is not very high, the surface free energy of Pt (1 1 1) plane is considerably lower than that of Pt (1 1 0) or Pt (1 0 0) planes [19,20], thus the surface energy becomes the predominate determinant and as a result, the deposited Pt takes the (1 1 1)-orientation. It should be noted that the (1 0 0)-orientation of Pt can still be obtained if the growth temperature is further raised higher than 700 • C [21]. The BTO layer deposited on the Pt/Ti/Si exhibits a typical perovskite structure with random texture.…”