Raman signatures of ferroic domain walls captured by principal component analysis

Abstract : Ferroic domain walls are currently investigated by several state-of-the art techniques in order to get a better understanding of their distinct, functional properties. Here, principal component analysis (PCA) of Raman maps is used to study ferroelectric domain walls (DWs) in LiNbO$_3$ and ferroelastic DWs in NdGaO$_3$. It is shown that PCA allows us to quickly and reliably identify small Raman peak variations at ferroelectric DWs and that the value of a peak shift can be deduced (accurately and without a priori) from a rst order Taylor expansion of the spectra. The ability of PCA to separate the contribution of ferroelastic domains and DWs to Raman spectra is emphasized. More generally, our results provide a novel route for the statistical analysis of any property mapped across a DW.
Document type :
Journal articles
Complete list of metadatas

Cited literature [29 references]  Display  Hide  Download

https://hal-cea.archives-ouvertes.fr/cea-01687736
Contributor : Dominique Girard <>
Submitted on : Monday, January 22, 2018 - 1:56:26 PM
Last modification on : Thursday, February 7, 2019 - 3:04:50 PM
Long-term archiving on : Thursday, May 24, 2018 - 2:41:55 AM

File

Nataf_2018_J._Phys_Condens._Ma...
Publisher files allowed on an open archive

Identifiers

Citation

Guillaume F. Nataf, Nicholas Barrett, J. Kreisel, M. Guennou. Raman signatures of ferroic domain walls captured by principal component analysis. Journal of Physics: Condensed Matter, IOP Publishing, 2018, 30, pp.035902. ⟨10.1088/1361-648X/aa9778⟩. ⟨cea-01687736⟩

Share

Metrics

Record views

270

Files downloads

132