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

Autor:	Nataf, Guillaume F., Guennou, Mael, Haußmann, Alexander, Barrett, Nick, Kreisel, Jens
Rok vydání:	2018
Předmět:	Condensed Matter - Materials Science
Zdroj:	G.F. Nataf, M. Guennou, A. Hau{\ss}mann, N. Barrett, and J. Kreisel, Phys. Status Solidi - Rapid Res. Lett. 10, 222 (2016)
Druh dokumentu:	Working Paper
DOI:	10.1002/pssr.201510303
Popis:	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. Comment: 10 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1802.02767 Zobrazit plný text záznamu View this record from Arxiv