Anisotropy of ordering kinetics in a single-phase adsorbed film: c(2{times}2)O-Mo(011)

Journal Article · Mon Dec 01 04:00:00 EST 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.15947· OSTI ID:554376

Fedorus, A G; Koval, V F; Naumovets, A G; Panchenko, O A ^[1]

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1. Institute of Physics, National Academy of Sciences of Ukraine, Prospekt Nauki 46, Kyiv-22, UA-252022 (Ukraine)

Kinetics of ordering in the c(2{times}2)O-Mo(011) system after temperature upquench is investigated by video low-energy electron diffraction. Variation of domain size is analyzed on the basis of the first moment of the structure function. We observed an anisotropy in the domain growth rate having anomalous orientation. The rate constant for the {l_angle}001{r_angle} direction is 1.5 times as large as that for the {l_angle}011{r_angle} one. The ratio is independent of temperature, i.e., the activation energies for ordering in the two directions are the same. The growth kinetics is characterized by a power law with the exponent x=1/2 for both directions. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 554376
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 24 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADSORPTION
ANISOTROPY
ELECTRON DIFFRACTION
KINETICS
MOLYBDENUM
ORDER-DISORDER TRANSFORMATIONS
OXYGEN
QUENCHING
SORPTIVE PROPERTIES
STRUCTURE FUNCTIONS