Bilateral switching of the modulated electrooptic contrast in PLZTN ceramics

Anno: 2006

Autori: Tikhomirov O., Labardi M., Ascoli C., Allegrini M., Galassi C.

Affiliazione autori: PolyLab CNR-INFM, Largo Bruno Pontecorvo 3, 56127 Pisa, Italy;
Institute of Solid State Physics, Chernogolovka, 142432 Moscow Region, Russian Federation;
Dipartimento di Fisica ‘Enrico Fermi’, Università di Pisa, Largo Bruno Pontecorvo 3, 56127 Pisa, Italy;
ISTEC-CNR, Via Granarolo 64, 48018 Faenza (RA), Italy

Abstract: 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.

Giornale/Rivista: SOLID STATE COMMUNICATIONS

Volume: 138 (2)      Da Pagina: 60  A: 63

Parole chiavi: Ferroelectrics; Domain structure; Electrooptic scanning microscopy
DOI: 10.1016/j.ssc.2006.02.012

Citazioni: 2
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
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