Amorphous Tl1-xCuiCl solid solution and their crystallization studied by optical absorption spectroscopy

Citation
S. Kondo et al., Amorphous Tl1-xCuiCl solid solution and their crystallization studied by optical absorption spectroscopy, MAT SCI E B, 78(2-3), 2000, pp. 90-95
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
ISSN journal
0921-5107 → ACNP
Volume
78
Issue
2-3
Year of publication
2000
Pages
90 - 95
Database
ISI
SICI code
0921-5107(200012)78:2-3<90:ATSSAT>2.0.ZU;2-#
Abstract
Amorphous solid solutions are obtainable for the binary Tl1-xCuxCl system b y means of two-sources evaporation onto 77 K substrates. Their annealing be havior has been studied for a him with x similar to0.4 by optical absorptio n spectroscopy. In the as-prepared film an appreciable amount of Cu 3d stat es is localized with the energies lying above the upper valence bands. On a nnealing the him, Cu+ ions migrate to form clusters in the amorphous enviro nment, with their size depending on the annealing temperature. The lowest a nnealing temperature at which the clusters are formed lies near the crystal lization temperature of amorphous CuCl. On further annealing at higher temp eratures, the clusters grow until the amorphous environment has a particula r atomic composition ratio suggestive of a new, novel compound, which exhib its a well defined crystallization temperature, 300 K. (C) 2000 Elsevier Sc ience S.A. All rights reserved.