Evolution of defect signatures at ferroelectric domain walls in Mg-doped LiNbO3

Guillaume F. Nataf; Mael Guennou; Alexander Haußmann; Nick Barrett; Jens Kreisel

doi:10.1002/pssr.201510303

Evolution of defect signatures at ferroelectric domain walls in Mg-doped LiNbO3

Materials Science 2018-02-09 v1

Authors: Guillaume F. Nataf , Mael Guennou , Alexander Haußmann , Nick Barrett , Jens Kreisel

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Abstract

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.

Keywords

lithium niobate magnesium doping ferroelectric domain walls raman spectroscopy defect structures polar defects

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@article{arxiv.1802.02767,
  title  = {Evolution of defect signatures at ferroelectric domain walls in Mg-doped LiNbO3},
  author = {Guillaume F. Nataf and Mael Guennou and Alexander Haußmann and Nick Barrett and Jens Kreisel},
  journal= {arXiv preprint arXiv:1802.02767},
  year   = {2018}
}

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10 pages, 3 figures

Evolution of defect signatures at ferroelectric domain walls in Mg-doped LiNbO3

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