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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)


BaTiO<sub>3</sub>, diffraction-line broadening, dislocations, poling, strain, synchrotron radiation, x-ray diffraction


Balzar, D. , Ledbetter, H. , Stephens, P. , Park, E. and Routbort, J. (1999), Dislocation-Density Changes Upon Poling of Polycrystalline BaTiO<sub>3</sub>, Physical Review B (Condensed Matter and Materials Physics) (Accessed July 14, 2024)


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Created February 1, 1999, Updated February 17, 2017