A vitrifying structure transition in the Dy/Mo(112) adsorption system | Zendy

А.Г. Федорус | Zendy; V. Koval | Zendy; А.Г. Наумовец | Zendy; H. Pfnür | Zendy

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A vitrifying structure transition in the Dy/Mo(112) adsorption system

Author(s) -

А.Г. Федорус,

V. Koval,

А.Г. Наумовец,

H. Pfnür

Publication year - 2001

Publication title -

low temperature physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.356

H-Index - 43

eISSN - 1090-6517

pISSN - 1063-777X

DOI - 10.1063/1.1414575

Subject(s) - annealing (glass) , metastability , materials science , diffraction , crystallography , electron diffraction , adsorption , condensed matter physics , chemistry , optics , metallurgy , physics , organic chemistry

Annealing-driven irreversible structural transitions are studied by low-energy electron diffraction in submonolayer Dy films adsorbed on the Mo(112) surface. In a wide coverage range θ>0.07, Dy overlayers deposited at low temperatures (T≈100 K) are ordered and keep their structure upon annealing up to 350–600 K. Near θ=0.68, the overlayers are stable to high-temperature annealing (Ta=1000 K) as well, whereas the denser films are metastable and transform to more stable ordered structures. An unusual annealing effect is found for θ<0.58: the initially ordered metastable phases are replaced by phases having no extended order, which are assumed to be two-dimensional glasses.

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