Bilateral switching of the modulated electrooptic contrast in PLZTN ceramics |
| |
Authors: | O Tikhomirov M Labardi M Allegrini C Galassi |
| |
Institution: | a PolyLab CNR-INFM, Largo Bruno Pontecorvo 3, 56127 Pisa, Italy b Institute of Solid State Physics, Chernogolovka, 142432 Moscow Region, Russian Federation c Dipartimento di Fisica ‘Enrico Fermi’, Università di Pisa, Largo Bruno Pontecorvo 3, 56127 Pisa, Italy d ISTEC-CNR, Via Granarolo 64, 48018 Faenza (RA), Italy |
| |
Abstract: | Spatial distribution of ferroelectric polarization in Pb(Zr,Ti)O3 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° switching processes in ferroelectric grains of arbitrary orientation. |
| |
Keywords: | 77 80 Dj 78 20 Jq |
本文献已被 ScienceDirect 等数据库收录! |
|