90° elastic domains were observed after local polings in epitaxial ferroelectric Pb(Zr0.2Ti0.8)O3 thin films via piezoresponse force microscopy. An area of internal stress arises under a conductive atomic force microscope tip due to the opposite signs of the converse piezoelectric effects in the switched domain and the unswitched films surrounding. The formation of 90° domains leads to the relaxation of the internal stress and stabilization of 180° domain after turning off the electric field applied by the tip. The criterion that formulates the necessary condition for realization of the relaxation mechanism is presented as well. © 2004 American Institute of Physics.
Published in:
Applied Physics Letters
(Volume:84
,
Issue:
2
)
Date of Publication:
Jan 2004
- Page(s):
-
254
-
256
- ISSN :
-
0003-6951
- Digital Object Identifier :
-
10.1063/1.1633970
- Product Type:
-
Journals & Magazines
- Date of Current Version :
-
18 June 2009
- Issue Date :
-
Jan 2004