Citation
D. Balzar et al., Dislocation-density changes upon poling of polycrystalline BaTiO3, PHYS REV B, 59(5), 1999, pp. 3414-3420
Citations number
51
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829
→ ACNP
Volume
59
Issue
5
Year of publication
1999
Pages
3414 - 3420
Database
ISI
SICI code
0163-1829(19990201)59:5<3414:DCUPOP>2.0.ZU;2-N
Abstract
We report evidence for a significant increase of bulk dislocation density u
pon poling of polycrystalline BaTiO3. The synchrotron high-resolution x-ray
-diffraction measurements yield a dislocation density on the order of 10(9)
/cm(2) and an associated strain-energy increase of about 20 kJ/m(3). This i
mplies that the application of an external poling field generates defects i
n the structure and increases the internal stress. Possible consequences in
both bulk and thin-him applications include accelerated aging and microcra
cking. [S0163-1829(99)06005-1].