%0 Journal Article %T Raman signatures of ferroic domain walls captured by principal component analysis %+ Laboratoire d'Etude des NanoStructures et Imagerie de Surface (LENSIS) %+ Luxembourg Institute of Science and Technology (LIST) %+ Department of Materials Science and Metallurgy [Cambridge University] (DMSM) %A Nataf, Guillaume F. %A Barrett, Nicholas %A Kreisel, J. %A Guennou, M. %Z This work was supported by the Luxembourg National Research Fund (FNR) under project CO-FERMAT FNR/P12/4853155/Kreisel. %< avec comité de lecture %@ 0953-8984 %J Journal of Physics: Condensed Matter %I IOP Publishing %V 30 %P 035902 %8 2018-01-24 %D 2018 %R 10.1088/1361-648X/aa9778 %K domain wall %K multivariate statistical analysis %K Raman %Z Physics [physics]Journal articles %X Ferroic domain walls are currently investigated by several state-of-the art techniques in orderto get a better understanding of their distinct, functional properties. Here, principal componentanalysis (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 reliablyidentify small Raman peak variations at ferroelectric DWs and that the value of a peak shiftcan be deduced (accurately and without a priori) from a rst order Taylor expansion ofthe spectra. The ability of PCA to separate the contribution of ferroelastic domains and DWsto Raman spectra is emphasized. More generally, our results provide a novel route for thestatistical analysis of any property mapped across a DW. %G English %2 https://cea.hal.science/cea-01687736/document %2 https://cea.hal.science/cea-01687736/file/Nataf_2018_J._Phys_Condens._Matter_30_035902_2.pdf %L cea-01687736 %U https://cea.hal.science/cea-01687736 %~ CEA %~ CNRS %~ IRAMIS-SPEC %~ CEA-UPSAY %~ UNIV-PARIS-SACLAY %~ CEA-UPSAY-SACLAY %~ TEST-HALCNRS %~ GS-ENGINEERING %~ IRAMIS %~ GS-PHYSIQUE %~ INSTITUT-SCIENCES-LUMIERE