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Characterization of europium implanted LiNbO3

Published online by Cambridge University Press:  03 March 2011

P. Moretti
Affiliation:
Département de Physique des Matériaux (URA CNRS 172), Université Claude Bernard Lyon I, 69622 Villeurbanne Cédex, France
B. Canut
Affiliation:
Département de Physique des Matériaux (URA CNRS 172), Université Claude Bernard Lyon I, 69622 Villeurbanne Cédex, France
S.M.M. Ramos
Affiliation:
Département de Physique des Matériaux (URA CNRS 172), Université Claude Bernard Lyon I, 69622 Villeurbanne Cédex, France
R. Brenier
Affiliation:
Département de Physique des Matériaux (URA CNRS 172), Université Claude Bernard Lyon I, 69622 Villeurbanne Cédex, France
P. Thévenard
Affiliation:
Département de Physique des Matériaux (URA CNRS 172), Université Claude Bernard Lyon I, 69622 Villeurbanne Cédex, France
D. Poker
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
J.B.M. Da Cunha
Affiliation:
Instituto de Fisica, UFRGS, Caixa Postal 15051, Porto Alegre, RS, Brasil
L. Amaral
Affiliation:
Instituto de Fisica, UFRGS, Caixa Postal 15051, Porto Alegre, RS, Brasil
A. Vasquez
Affiliation:
Instituto de Fisica, UFRGS, Caixa Postal 15051, Porto Alegre, RS, Brasil
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Abstract

LiNbO3 single crystals were implanted at room temperature with Eu+ ions at 70 keV with fluence ranging from 0.5 to 5 × 1016 ions · cm−2. The damage in the implanted layer has been investigated by Channeling Rutherford Backscattering (RBS-C), and the oxidation states of the cations have been determined by x-ray photoelectron spectroscopy (XPS). Following implantation, a fully amorphized layer of 60 nm is generated, even for the lowest fluence employed. Subsequent annealing in air, in the range 800–1250 K, was applied to restore tentatively the crystallinity and promote the substitutional incorporation of Eu in the crystal. Only a partial recrystallization of the damaged layer was observed. For as-implanted samples, XPS spectra clearly reveal europium in Eu2+ and Eu3+ states, and the Nb5+ ions are driven to lower charge states.

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Copyright
Copyright © Materials Research Society 1993

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