Surface diffusion and phase transitions in electropositive overlayers

Author

Loburets, A.T. ; Naumovets, A.G. ; Paliy, M.V. ; Senenko, N.B. ; Vedula, Yu.S.

Author_Institution

Poltava Tech. Univ., Ukraine

fYear

1996

fDate

7-12 Jul 1996

Firstpage

24

Lastpage

28

Abstract

Surface diffusion (SD) is a phenomenon of particular importance in vacuum microelectronic devices whose characteristics are highly sensitive to microgeometry of electrodes and to distribution of adsorbed species on their surfaces. In this work we have investigated the correlation between the variation of SD rate of electropositive adsorbates (alkali, alkaline-earth and rare-earth metals) and phase transitions occurring in their overlayers with increasing coverage. Extremely strong phase effects in SD of such adsorbates have been found. Possible mechanisms of SD are discussed

Keywords

adsorption; microelectrodes; molybdenum; surface diffusion; surface phase transformations; tungsten; vacuum microelectronics; Mo; W; adsorbed species; electrodes; electropositive overlayers; microgeometry; overlayers; phase transitions; surface diffusion; vacuum microelectronic devices; Cathodes; Earth; Electrodes; Electron emission; Microelectronics; Nanoelectronics; Performance evaluation; Physics; Stability; Strontium;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Microelectronics Conference, 1996. IVMC'96., 9th International

Conference_Location

St. Petersburg

Print_ISBN

0-7803-3594-5

Type

conf

DOI

10.1109/IVMC.1996.601766

Filename

601766