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

Citation
A. Fedorus et al., A vitrifying structure transition in the Dy/Mo(112) adsorption system, LOW TEMP PH, 27(9-10), 2001, pp. 850-853
Citations number
12
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
LOW TEMPERATURE PHYSICS
ISSN journal
1063777X → ACNP
Volume
27
Issue
9-10
Year of publication
2001
Pages
850 - 853
Database
ISI
SICI code
1063-777X(200109/10)27:9-10<850:AVSTIT>2.0.ZU;2-G
Abstract
Annealing-driven irreversible structural transitions are studied by low-ene rgy electron diffraction in submonolayer Dy films adsorbed on the Mo(112) s urface. In a wide coverage range theta >0.07, Dy overlayers deposited at lo w temperatures (T approximate to 100 K) are ordered and keep their structur e upon annealing up to 350-600 K. Near theta =0.68, the overlayers are stab le to high-temperature annealing (T-a=1000 K) as well, whereas the denser f ilms are metastable and transform to more stable ordered structures. An unu sual annealing effect is found for theta <0.58: the initially ordered metas table phases are replaced by phases having no extended order, which are ass umed to be two-dimensional glasses. (C) 2001 American Institute of Physics.