Low Temperature Physics: 36, 677 (2010); https://doi.org/10.1063/1.3490832 (5 pages)
Fizika Nizkikh Temperatur: Volume 36, Number 8-9 (August 2010), p. 854-860    ( to contents , go back )

Surface alloy formation and two-dimensional vitrification in adsorbed monolayers on (112) molybdenum surface

А.А. Mitryaev, А.G. Naumovets, and А.G. Fedorus

Institute of Physics of the National Academy of Sciences of Ukraine, 46 Nauki Ave., Kyiv 03028, Ukraine
E-mail: naumov@iop.kiev.ua
pos Анотація:

Received December 3, 2009

Abstract

By means of low-energy electron diffraction, scanning tunneling microscopy, contact potential difference and Auger electron spectroscopy methods we observed the formation of surface alloys under annealing of Dy, Gd, Sr, and Be monolayers adsorbed on the Mo(112) surface. The surface alloys are formed as nanodispersed systems of oligomer clusters in the Dy and Sr films, and as a continuous coverage in the Ве and Gd ones. The Dy films, forming Dy–Мо surface alloy on annealing, are shown to undergo a transition to a two-dimensional glass state on subsequent cooling (hardening) to low temperatures while the surface alloys of Ве and Gd with Мо(112) are formed in a crystal state.

PACS: 64.70.pe Metallic glasses;
PACS: 68.43.Fg Adsorbate structure;
PACS: 61.05.jh Low-energy electron diffraction(LEED).

Key words: adsorbed layers, surface alloys, structure, two-dimensional vitrification, work function.

Download 426492 byte View Contents