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Electronic paramagnetic resonance study of Cu2+ ions in copper ion-exchanged layers of lithium niobate crystals

Published online by Cambridge University Press:  31 January 2011

F. Caccavale ,
C. Sada ,
F. Segato ,
L. D. Bogomolova ,
V. A. Jachkin  and
N. A. Krasil'nikova
F. Caccavale*
Affiliation:
INFM-UdR Padova and Department of Materials Science, University of Milano Bicocca, via Cozzi 53, 20125 Milano, Italy
C. Sada
Affiliation:
Physics Department, INFM-University of Padova, via Marzolo 8, 35131 Padova, Italy
F. Segato
Affiliation:
Physics Department, INFM-University of Padova, via Marzolo 8, 35131 Padova, Italy
L. D. Bogomolova
Affiliation:
Institute of Nuclear Physics, Moscow State University, 119899 Moscow, Russia
V. A. Jachkin
Affiliation:
Institute of Nuclear Physics, Moscow State University, 119899 Moscow, Russia
N. A. Krasil'nikova
Affiliation:
Institute of Nuclear Physics, Moscow State University, 119899 Moscow, Russia
*
a)Address all correspondence to this author. e-mial: caccavale@padova.infm.it
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Abstract

Copper-doped LiNbO3 layers prepared by an Cu–Li ion-exchange process are characterized by electronic paramagnetic resonance. It is found that the majority of Cu2+ ions are coupled by strong exchange interactions which is characteristic of short distances between paramagnetic ions. Such ions are accumulated in a thin layer near the crystal surface and can enter in new crystalline phases formed as a result of the Cu–Li ion exchange. A small amount of Cu2+ ions is incorporated into weakly distorted LiNbO3 crystal lattice inside the diffusion layer.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 6 , June 2001 , pp. 1554 - 1558
Copyright
Copyright © Materials Research Society 2001

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