Structure and phases of the Au(001) surface: X-ray scattering measurements

Journal Article · Wed May 01 04:00:00 EDT 1991 · Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA)

DOI:https://doi.org/10.1116/1.577476· OSTI ID:5626366

Zehner, D M ^[1]; Mochrie, S G.J. ^[2]; Ocko, B M; Gibbs, D ^[3]

---

1. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (USA)
2. Physics Department, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (USA)
3. Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (USA)

X-ray diffraction is used to study the phase behavior and structure of the Au(001) surface between 300 K and the triple point. For {ital T}{gt}1170 K, the x-ray reflectivity is consistent with a thin, disordered surface film. At {ital T}=1170 K, there is a reversible transition to an incommensurate, hexagonal overlayer that resides on top of the square substrate. At 970 K, the orientation of the hexagonal layer rotates discontinuously by 0.81 {degree} with no observable change in incommensurability.

• DOE Contract Number: AC02-76CH00016; AC05-84OR21400
• OSTI ID: 5626366
• Journal Information: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA), Journal Name: Journal of Vacuum Science and Technology, A (Vacuum, Surfaces and Films); (USA) Vol. 9:3; ISSN JVTAD; ISSN 0734-2101
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
COHERENT SCATTERING
CRYSTAL FACES
CRYSTAL STRUCTURE
DIFFRACTION
ELEMENTS
GOLD
METALS
MICROSTRUCTURE
ORDER-DISORDER TRANSFORMATIONS
PHASE STUDIES
PHASE TRANSFORMATIONS
SCATTERING
TRANSITION ELEMENTS
TRIPLE POINT
X-RAY DIFFRACTION