Faceting transformations of the stepped Pt(001) surface

Journal Article · Mon Nov 08 04:00:00 EST 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.71.3166· OSTI ID:5747738

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

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1. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
2. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6057 (United States)
3. Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307 (United States)

We describe x-ray scattering studies of the structure and morphology of a stepped Pt(001) surface between 300 and 1850 K. Two distinct faceting transformations are observed. Above 1820 K, we find an unreconstructed, stepped surface. Between 1820 and 1620 K, there is coexistence among hexagonally reconstructed, step-free domains and unreconstructed, stepped domains. The tilt angle of the unreconstructed domains exhibits a one-half power-law dependence on reduced temperature. At 1620 K, there is a second morphological transformation at which the unreconstructed domains are replaced by [ital magic] [ital vicinals].

• DOE Contract Number: AC02-76CH00016; AC05-84OR21400
• OSTI ID: 5747738
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 71:19; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
COHERENT SCATTERING
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DIFFRACTION
DOMAIN STRUCTURE
ELEMENTS
METALS
MICROSTRUCTURE
MORPHOLOGY
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PLATINUM
PLATINUM METALS
SCATTERING
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
X-RAY DIFFRACTION