No alloying in Fe deposited on Pd(001) at room temperature

Journal Article · Thu Jun 15 04:00:00 EDT 2006 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.73.245432· OSTI ID:20853272

Meyerheim, H L; Popescu, R; Kirschner, J ^[1]

---

1. Max-Planck-Institut fuer Mikrostrukturphysik, Weinberg 2, D-06120 Halle (Germany)

Using surface x-ray diffraction we have investigated growth and structure of Fe deposited on Pd(001) at room temperature. Up to about 4.2 ML, the maximum film thickness studied, Fe grows in layer-by-layer mode without sizable intermixing with Pd. Up to 1.5 ML coverage the Fe film adopts a fct-structure followed by a transition to a bct-structure at higher film thickness. The top Pd interlayer spacing, which in the case of uncovered Pd(001) is expanded by up to 6.5{+-}2.0% relative to the bulk due to adsorbed hydrogen relaxes to 0{+-}2% upon adsorption of 0.6 ML Fe, possibly due to displacement into subsurface sites. Mild annealing (400 K) of a 1 ML Fe/Pd(001) sample induces surface alloying leading to a disordered two layer thick fct-Fe{sub 50}Pd{sub 50}-alloy.

• OSTI ID: 20853272
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 24 Vol. 73; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ADSORPTION
ANNEALING
CRYSTAL GROWTH
FILMS
HYDROGEN
IRON
LAYERS
PALLADIUM
PHASE TRANSFORMATIONS
SURFACES
TETRAGONAL LATTICES
THICKNESS
X-RAY DIFFRACTION