ISSN:
1432-0630
Keywords:
71.20
;
71.55
;
73.00
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract Results of UPS and XPS measurements performed on LiNbO3 single crystals reduced by Ar+-ion bombardment are presented. The influence of reduction dose on the type and concentration of induced defects is studied. It is shown that Nb ions change their valency state from 5+to 4+for low reduction doses and to 3+and 2+for high reduction doses. Further it is shown that Nb4+ ions can be considered as bulk defects which manifest themselves in a broad emission band in the gap centred at 1.6 eV below the Fermi level and that defect ions Nb3+ and Nb2+ manifesting themselves in a narrow emission band at 3.9 eV below the Fermi level are present only in the outermost layers of the surface. An attempt is made to compare photoelectron spectra with optical spectra of LiNbO3 and correctness of this procedure is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01177166
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