Evolution of defect signatures at ferroelectric domain walls in Mg-doped LiNbO3
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 concentrati...
Gespeichert in:
Veröffentlicht in: | Physica status solidi. PSS-RRL. Rapid research letters 2016-03, Vol.10 (3), p.222-226 |
---|---|
Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | 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. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)
In this Letter, the domain structure of uniaxial ferroelectric lithium niobate single crystals is investigated using Raman spectroscopy mapping. The study of a wide series of Mg doping concentrations, before and after annealing, gives a new insight into the interaction of defects with ferroelectric domain walls. |
---|---|
ISSN: | 1862-6254 1862-6270 |
DOI: | 10.1002/pssr.201510303 |