Dislocation-Density Changes Upon Poling of Polycrystalline BaTiO3
Davor Balzar, H M. Ledbetter, P W. Stephens, E T. Park, J L. Routbort
We report evidence for a significant increase of bulk dilocation density upon poling of polycrystalline BaTiO3. The synchrotron high-resolution x-ray diffraction measurements yield a dislocation density on the order of 109/cm2 and an associated strain-energy increase of about 20 kJ/m3. This implies that the application of an external poling field generated deflects in the structure and increases the internal stress. Possible consequences in both bulk and thin-filmed applications include accelerated aging and microcracking.
Physical Review B (Condensed Matter and Materials Physics)
, Ledbetter, H.
, Stephens, P.
, Park, E.
and Routbort, J.
Dislocation-Density Changes Upon Poling of Polycrystalline BaTiO<sub>3</sub>, Physical Review B (Condensed Matter and Materials Physics)
(Accessed December 4, 2023)