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Lattice site for transition and rare-earth impurities in LiNbO3 by ion-beam methods

Published online by Cambridge University Press:  29 June 2016

L. Rebouta ,
J. C. Soares ,
M. F. da Silva ,
J. A. Sanz-García ,
E. Dieguez  and
F. Agulló-López
L. Rebouta
Affiliation:
Centro de Fisica Nuclear da Universidade de Lisboa, Av. Prof. Gama Pinto 2, 1699 Lisboa, Portugal
J. C. Soares
Affiliation:
Centro de Fisica Nuclear da Universidade de Lisboa, Av. Prof. Gama Pinto 2, 1699 Lisboa, Portugal
M. F. da Silva
Affiliation:
Departamento de Física, Institute de Ciências e Engenharia Nucleares LNETI, 2685 Sacavém, Portugal
J. A. Sanz-García
Affiliation:
Departamento de Física Aplicada, C-IV, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
E. Dieguez
Affiliation:
Departamento de Física Aplicada, C-IV, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
F. Agulló-López
Affiliation:
Departamento de Física Aplicada, C-IV, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
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Abstract

The lattice location of several transition metal (Hf, Ta) and rare-earth (Nd, Eu) impurities has been investigated in LiNbO3 by ion-beam channeling methods, including Rutherford backscattering and the 7Li(p, α)4 He nuclear reaction. From the detailed analysis of the angular scans near crystallographic axes and planes and the comparison between the two methods, it has been concluded that Hf lies at a Li site, but Ta at a Nb site, whereas Eu and Nd present double occupancy. By using additional results on other impurities, a wider picture of location behavior is described and possible physical mechanisms are discussed.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 1 , January 1992 , pp. 130 - 135
Copyright
Copyright © Materials Research Society 1992

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