Strain-induced polarization rotation in epitaxial (001) BiFeO3 thin films.
Direct measurement of the remanent polarization of high quality (001)-oriented epitaxial BiFeO3 thin films shows a strong strain dependence, even larger than conventional (001)-oriented PbTiO3 films. Thermodynamic analysis reveals that a strain-induced polarization rotation mechanism is responsible for the large change in the out-of-plane polarization of (001) BiFeO3 with biaxial strain while the spontaneous polarization itself remains almost constant.
Jang
H W
HW
Department of Materials Science and Engineering, University of Wisconsin, Madison, Wisconsin 53706, USA.
Baek
S H
SH
Ortiz
D
D
Folkman
C M
CM
Das
R R
RR
Chu
Y H
YH
Shafer
P
P
Zhang
J X
JX
Choudhury
S
S
Vaithyanathan
V
V
Chen
Y B
YB
Felker
D A
DA
Biegalski
M D
MD
Rzchowski
M S
MS
Pan
X Q
XQ
Schlom
D G
DG
Chen
L Q
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Ramesh
R
R
Eom
C B
CB