Reference : Evolution of defect signatures at ferroelectric domain walls in Mg-doped LiNbO3
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
Evolution of defect signatures at ferroelectric domain walls in Mg-doped LiNbO3
Nataf, Guillaume F. [> >]
Guennou, Mael mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit]
Haussmann, Alexander [> >]
Barrett, Nick [> >]
Kreisel, Jens mailto [University of Luxembourg > Rectorate >]
Physica Status Solidi. Rapid Research Letters
Yes (verified by ORBilu)
[en] The domain structure of uniaxial ferroelectric lithium niobate single crystals is investigated using Raman spectroscopy mapping. The influence of doping with magnesium and poling at room temperature is studied by analysing frequency shifts at domain walls and their variations with dopant concentration and annealing conditions. It is shown that defects are stabilized at domain walls and that changes in the defect structures with Mg concentration can be probed by the shift of Raman modes. We show that the signatures of polar defects in the bulk and at the domain walls differ. (C) 2016 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim

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