Effect of alloying BaTiO3 with BiZn1/2Ti1/2O3 on polarization reversal

Changes in the polarization state of ferroelectric materials are mediated through the motion of planar defects such as domain walls. The interplay between the two processes that enable the inversion of the macroscopic polarization in ferroelectric materials, non-180° (domain reorientation) and 180°...

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Bibliographic Details
Published in:Applied physics letters 2020-07, Vol.117 (4)
Main Authors: Fancher, C. M., Choe, H., Gorfman, S., Simons, H., Chung, C. C., Ziolkowski, M., Prasertpalichat, S., Cann, D. P., Jones, J. L.
Format: Article
Language:English
Subjects:
Alloying effects
Applied physics
Barium titanates
ceramics
chemical compounds
crystallographic defects
Dipoles
Domain walls
Electric fields
Ferroelectric materials
Ferroelectricity
MATERIALS SCIENCE
perovskites
piezoelectric materials
Polarization
powder diffraction
X-ray diffraction
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Summary:Changes in the polarization state of ferroelectric materials are mediated through the motion of planar defects such as domain walls. The interplay between the two processes that enable the inversion of the macroscopic polarization in ferroelectric materials, non-180° (domain reorientation) and 180° (domain reversal), is not well understood. In this work, time-resolved x-ray diffraction was carried out during the application of an external electric field to investigate the dynamic electric-field response mechanisms of BaTiO3 (BT) and BiZn1/2Ti1/2O3(BZT)-modified BT (0.94BT-0.06BZT). These data evidence that the incorporation of BZT into BT fundamentally alters what processes are activated to reorient the polarization by 180°. Polarization reversal in BT is achieved through direct inversion of spontaneous dipoles. However, the addition of BZT into BT promotes a two-step polarization reversal process (i.e., two consecutive non-180° reorientation events).
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0013410