Article (Scientific journals)
Direct observation of polar tweed in LaAlO3
Salje, Ekhard K. H.; Alexe, Marin; Kustov, Sergey et al.
2016In SCIENTIFIC REPORTS, 6
Peer reviewed
 

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Abstract :
[en] Polar tweed was discovered in mechanically stressed LaAlO3. Local patches of strained material (diameter ca. 5 mu m) form interwoven patterns seen in birefringence images, Piezo-Force Microscopy (PFM) and Resonant Piezoelectric Spectroscopy (RPS). PFM and RPS observations prove unequivocally that electrical polarity exists inside the tweed patterns of LaAlO3. The local piezoelectric effect varies greatly within the tweed patterns and reaches magnitudes similar to quartz. The patterns were mapped by the shift of the E-g soft-mode frequency by Raman spectroscopy.
Disciplines :
Physics
Author, co-author :
Salje, Ekhard K. H.
Alexe, Marin
Kustov, Sergey
Weber, Mads C.
Schiemer, Jason
Nataf, Guillaume F.
Kreisel, Jens ;  University of Luxembourg > Rectorate
External co-authors :
yes
Language :
English
Title :
Direct observation of polar tweed in LaAlO3
Publication date :
2016
Journal title :
SCIENTIFIC REPORTS
Volume :
6
Peer reviewed :
Peer reviewed
Focus Area :
Physics and Materials Science
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