Adsorption Characteristics of Praseodymium-Doped Aluminum Film

A. I. Kiselev; Киселев А. И.; N. A. Popov; Попов Н. А.; V. G. Shevchenko; Шевченко В. Г.

doi:10.31857/S0044185623700456

Adsorption Characteristics of Praseodymium-Doped Aluminum Film

Authors: Kiselev A.I.¹, Popov N.A.¹, Shevchenko V.G.¹
Affiliations:
1. Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Issue: Vol 59, No 4 (2023)
Pages: 373-379
Section: ФИЗИКО-ХИМИЧЕСКИЕ ПРОЦЕССЫ НА МЕЖФАЗНЫХ ГРАНИЦАХ
URL: https://ruspoj.com/0044-1856/article/view/663898
DOI: https://doi.org/10.31857/S0044185623700456
EDN: https://elibrary.ru/VZRKQH
ID: 663898

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Abstract

Optical constants n and k of a polycrystalline film of aluminum alloy and 2.54 at % praseodymium were measured at room temperature. Based on these data, optical-conductivity spectra were obtained for a clean and oxidized alloy surface. When analyzing the results of comparing these spectra with the model ones, the electronic characteristics of optical transitions, including the characteristics of surface states of electrons, were obtained. It is shown that the conduction band of an alloy with a clean surface is split to a minimum extent. The oxygen-adsorption heat values on the surface of an Al–2.54 at % Pr alloy film have been calculated. The equilibrium position of the adsorption–desorption processes of an alloy film at room temperature is significantly shifted towards desorption.

Keywords

ellipsometry, optical constants, optical conductivity, electronic characteristics of optical, transitions, surface electronic states, heat of desorption

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