Title: Lattice location and perturbed angular correlation studies of implanted Ag in SrTiO3
Authors: Marques, A. C ×
Wahl, Ulrich
Correia, J. G
Rita, E
Soares, J. C #
Issue Date: Aug-2006
Publisher: Elsevier
Series Title: Nuclear Instruments & Methods in Physics Research B vol:249 pages:882-885
Abstract: Lattice site location and local environment characterization of implanted Ag-111 in SrTiO3 by means of the emission channeling (EC) and gamma-gamma perturbed angular correlation (PAC) techniques are reported. The angular distribution of beta(-) particles emitted from the Ag-111 decay was monitored with a position-sensitive detector as a function of annealing temperature up to 900 degrees C. In the as-implanted state Ag occupies several lattice sites in SrTiO3, Upon annealing, near-Sr and near-Ti occupancies increased to 64% and 18%, while an octahedral interstitial fraction vanished. Ag atoms on near-Sr and near-Ti sites are still displaced by similar to 0.2 angstrom from ideal cubic positions. Subsequent PAC measurements confirmed that similar to 20% of Ag-111 atoms are in specific sites of non-cubic environment, characterized by a unique electrical-field-gradient (EFG), while similar to 80% were subject to a wide EFG distribution. (c) 2006 Elsevier B.V. All rights reserved.
ISSN: 0168-583X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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