F+ and F centers in α-Al2O3 by electron-induced x-ray emission spectroscopy and cathodoluminescence

Autor:	P. Jonnard, G. Blaise, C. Bonnelle, C. Roques-Carmes, G. Rémond
Rok vydání:	2000
Předmět:	Annealing (metallurgy) Chemistry Astrophysics::High Energy Astrophysical Phenomena Inverse photoemission spectroscopy Analytical chemistry General Physics and Astronomy Cathodoluminescence Corundum Electron engineering.material Cathode ray engineering Emission spectrum Single crystal
Zdroj:	Journal of Applied Physics. 88:6413-6417
ISSN:	1089-7550 0021-8979
Popis:	Study of an α-Al2O3 single crystal by electron-induced x-ray emission spectroscopy and cathodoluminescence is reported. The relative intensities of optical emissions due to F+ and F centers have been determined as a function of the parameters of the electron beam and the annealing of the sample. It is shown that the F+ centers, i.e., the oxygen vacancies with one trapped electron, are predominant when the density of the incident electron beam increases. Similar variation is observed when the electron energy varies from 1 to 4 keV. From the comparison between x-ray and optical spectra, the F+ centers are determined to be stable defects in the bulk of the sample.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f7b30fc7882735340579d1c6b123aedd https://doi.org/10.1063/1.1324697 Zobrazit plný text záznamu