Diffusion during annealing of Al/Cu/Fe thin films

Čekada, Miha; Panjan, Peter; Dolinšek, J.; Zalar, A.; Medunić, Zvonko; Jakšić, Milko; Radić, Nikola

doi:10.1016/j.tsf.2007.03.031

Cited by 5 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is important to note that, along the (1, 0) axis, only the (3, 0) spot has appreciable intensity in this structure. The formation of Al 4 Cu 9 has been reported in similar studies during the annealing of Al/Cu/Fe thin films [38], by phase transformation in Cu-Al thin films [39] and by annealing Cu/Al multilayer thin films [40].…”

Section: Leed and Stm Measurementssupporting

confidence: 65%

Pseudomorphy, surface alloys and the role of elementary clusters on the domain orientations in the Cu/Al₁₃Co₄(100) system

Addou

Shukla

Weerd

et al. 2011

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

We have used the pseudo-tenfold surface of the orthorhombic Al(13)Co(4) crystal as a template for the adsorption of Cu thin films of various thicknesses deposited at different temperatures. This study has been carried out by means of low energy electron diffraction (LEED), scanning tunnelling microscopy (STM), x-ray photoelectron spectroscopy (XPS) and x-ray photoelectron diffraction (XPD). From 300 to 573 K, Cu adatoms grow pseudomorphically up to one monolayer. At 300 K, the β-Al(Cu, Co) phase appears for coverages greater than one monolayer. For higher temperature deposition, the β-Al(Cu, Co) phase further transforms into the γ-Al(4)Cu(9) phase. Both β and γ phases grow as two (110) domains rotated by 72° ± 1° from each other. Instead of following the substrate symmetry, it is the orientations of the bipentagonal motifs present on the clean Al(13)Co(4)(100) surface that dictate the growth orientation of these domains. The initial bulk composition and structural complexity of the substrate have a minor role in the formation of the γ-Al(4)Cu(9) phase as long as the amount of Al and the Cu film thickness reach a critical stoichiometry.

show abstract

Section: Leed and Stm Measurementssupporting

confidence: 65%

Pseudomorphy, surface alloys and the role of elementary clusters on the domain orientations in the Cu/Al₁₃Co₄(100) system

Addou

Shukla

Weerd

et al. 2011

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…Films are deposited at a pressure of 2.10 À2 mbar in an atmosphere containing 10% H 2 -90% Ar. The sputtering system is equipped with three independent magnetrons focused at the center of the substrate holder and inclined by 30 with respect to the substrate surface normal. The target to substrate distance is set equal to 10 cm and the sample rotates at 28 rpm during deposition to ensure homogeneity.…”

Section: Methodsmentioning

confidence: 99%

Structurally complex metallic coatings in the Al-Cu system and their orientation relationships with an icosahedral quasicrystal

et al. 2010

View full text Add to dashboard Cite

Quasicrystals have been identified as alloys possessing unusually low surface energy. This results in poor adhesion properties of quasicrystalline coatings when deposited on metallic substrates, hindering the development of these new materials for technological applications. Here we investigate the possible use of complex Al-Cu metallic phases as interface layers to accommodate the structural and electronic mismatch between a quasicrystalline coating and a metallic substrate and improve adhesion. First, we show that all stable low-temperature phases of the Al-Cu system can be grown as thin films using DC magnetron sputtering. Among the various possible phases, we select the g-brass g-Al 4 Cu 9 as a promising candidate for the interface layer. Then the g-Al 4 Cu 9 phase is grown on the fivefold surface of an icosahedral (i-) Al-Pd-Mn quasicrystal. The interface is investigated by transmission electron microscopy and shows a clear texturing of the film. The grains exhibit rotational epitaxy with the substrate. We find that the interface is mainly composed of a b-phase of unknown chemical composition and sometimes exhibits g grains in direct contact with the quasicrystalline substrate. Occasionally, we observe a fourth phase at the b/g interface, identified as b 1 , possessing a lattice parameter a b1 equal to 2a b and 2/3a g .

show abstract

“…The formation of Al 2 Cu, Al 4 Cu 9 , AlCu 3 , and Al x Cu has also been reported in similar studies. [22][23][24][25] In particular, Jiang et al 24 have shown that the formation of -Al 2 Cu and ␥-Al 4 Cu 9 is controlled by interfacial and grain boundary diffusion. Activation energies of about 0.8 eV have been determined for the formation of these two phases.…”

Section: Introductionmentioning

confidence: 99%

Complex metallic surface phases in the Al/Cu(111) system: An experimental and computational study

et al. 2009

View full text Add to dashboard Cite

To cite this version: T. Duguet, Emilie Gaudry, Th. Deniozou, J. Ledieu, M.-C. de Weerd, et al.. Complex metallic surface phases in the Al/Cu(111) system: An experimental and computational study. Physical Review B:The growth of complex intermetallics as surface alloys is investigated by annealing Al thin films deposited on Cu͑111͒ substrate in ultrahigh vacuum. Already at room temperature, the large lattice mismatch between Al and Cu results in interfacial intermixing. Upon annealing, various phases are formed by diffusion depending on the thickness of the Al films and the annealing temperature. The surface structures are characterized by scanning tunneling microscopy, low-energy electron diffraction, and x-ray photoelectron spectroscopy. Three different superlattice phases are identified as well as the complex Hume-Rothery ␥-Al 4 Cu 9 phase. The epitaxial relationships between the surface phases and the Cu͑111͒ substrate are determined. We further investigate the electronic structure of the ␥ phase by density functional calculations. Experimental valence bands are compared to calculated density of states and simulated STM images are used to identify possible bulk planes appearing as surface termination.

show abstract

Diffusion during annealing of Al/Cu/Fe thin films

Cited by 5 publications

References 12 publications

Pseudomorphy, surface alloys and the role of elementary clusters on the domain orientations in the Cu/Al₁₃Co₄(100) system

Pseudomorphy, surface alloys and the role of elementary clusters on the domain orientations in the Cu/Al₁₃Co₄(100) system

Structurally complex metallic coatings in the Al-Cu system and their orientation relationships with an icosahedral quasicrystal

Complex metallic surface phases in the Al/Cu(111) system: An experimental and computational study

Contact Info

Product

Resources

About

Diffusion during annealing of Al/Cu/Fe thin films

Cited by 5 publications

References 12 publications

Pseudomorphy, surface alloys and the role of elementary clusters on the domain orientations in the Cu/Al13Co4(100) system

Pseudomorphy, surface alloys and the role of elementary clusters on the domain orientations in the Cu/Al13Co4(100) system

Structurally complex metallic coatings in the Al-Cu system and their orientation relationships with an icosahedral quasicrystal

Complex metallic surface phases in the Al/Cu(111) system: An experimental and computational study

Contact Info

Product

Resources

About

Pseudomorphy, surface alloys and the role of elementary clusters on the domain orientations in the Cu/Al₁₃Co₄(100) system

Pseudomorphy, surface alloys and the role of elementary clusters on the domain orientations in the Cu/Al₁₃Co₄(100) system