Spatial distribution of ferroelectric polarization in Pb(Zr,Ti)O-3 ceramics doped with lanthanum and niobium has been investigated using scanning electrooptic confocal microscopy. Measurement of the modulated electrooptic signal in presence of a sinusoidal electric field reveals ferroelectric domains at microscopic scale not accessible to conventional polarized optical imaging. Both electrooptic images and local electrooptic loops have been observed after applying a bias electric field to the ceramic samples, being initially non-ferroelectric macroscopically. Bilateral reversal of the electrooptic contrast during the poling cycle has been detected and explained taking into account non-180 degrees switching processes in ferroelectric grains of arbitrary orientation. (c) 2006 Elsevier Ltd. All rights reserved.
|Autori interni:||ALLEGRINI, MARIA|
|Autori:||Tikhomirov O; Labardi M; Ascoli C; Allegrini M; Galassi C|
|Titolo:||Bilateral switching of the modulated electrooptic contrast in PLZTN ceramics RID C-3109-2009|
|Anno del prodotto:||2006|
|Digital Object Identifier (DOI):||10.1016/j.ssc.2006.02.012|
|Appare nelle tipologie:||1.1 Articolo in rivista|