LATTICE SITE DETERMINATION OF CR IN LOW DOPED LITHIUM-NIOBATE SINGLE-CRYSTALS USING PIXE CHANNELING/

Authors
KLING A SOARES JC DASILVA MF SANZGARCIA JA DIEGUEZ E AGULLOLOPEZ F
Citation
A. Kling et al., LATTICE SITE DETERMINATION OF CR IN LOW DOPED LITHIUM-NIOBATE SINGLE-CRYSTALS USING PIXE CHANNELING/, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 138, 1998, pp. 426-430
Citations number
19
Categorie Soggetti
Instument & Instrumentation","Nuclear Sciences & Tecnology","Physics, Atomic, Molecular & Chemical","Physics, Nuclear
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
138
Year of publication
1998
Pages
426 - 430
Database
ISI
SICI code
0168-583X(1998)138:<426:LSDOCI>2.0.ZU;2-9
Abstract
The lattice sites of Cr have been determined in LiNbO3:Cr doped with 0 .1 mol% Cr3+ as well as in LiNbO3:Cr,Mg doped with 0.1 mol% Cr3+ and 6 .0 mol% MgO in melt, using PIXE/channeling, In the case of LiNbO3:Cr f or the first time the occupation of both regular cation sites (60% on Li sites and 40% on Nb sites) has been observed by channeling for a tr ivalent impurity. For LiNbO3:Cr,Mg a significantly reduced fraction of Cr (20%) is located on Li sites. The major fraction (80%) occupies an interstitial site shifted 0.1 Angstrom from the regular Nb site towar ds the center of the octahedron. (C) 1998 Elsevier Science B.V.