1. Polarization control in ferroelectric PbTiO3 nanorods.
- Author
-
Sæterli, Ragnhild, Rørvik, Per Martin, Chang Chuan You, Holmestad, Randi, Tybell, Thomas, Grande, Tor, Helvoort, Antonius T. J. van, and Einarsrud, Mari-Ann
- Subjects
- *
POLARIZATION (Electricity) , *FERROELECTRICITY , *NANOSTRUCTURED materials , *FERROELECTRIC crystals research , *TITANATES - Abstract
In this work we demonstrate by transmission electron microscopy and piezoresponse force spectroscopy that the polarization direction in hydrothermally synthesized lead titanate (PbTiO3) nanorods can be changed from parallel to the nanorod axis to perpendicular to it by a simple heat treatment above the Curie temperature. The heat treatment also introduced 90° domains, caused a rearrangement of the surface and a reduction in the amounts of defects. The polarization of the heat-treated nanorods could be successively switched in the direction perpendicular to the nanorod axis. This control of the polarization in PbTiO3 nanorods opens up possibilities of tailoring the ferroelectric properties and is therefore highly relevant for the use of ferroelectric nanorods in devices. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF