Published in:

Physical Review B 69,6 (2004) 064113;

Abstract

Ferroelectric domains with antiparallel polarization are readily induced in congruent LiNbO3 with electric fields above 240 kV/cm at room temperature. Even in the absence of external fields, these 180degrees walls exhibit wide regions of shear strain, on the order of 10(-5), within a 10-mum range of the domain walls. Using x-ray topography on samples while applying electric fields of 0-90 kV/cm, we have observed large-scale reversible domain changes. A detailed strain analysis of the piezoelectric behavior at the domain walls, as well as within the domains, indicates that substantial surface displacement is associated with the high contrast of ferroelectric domains in x-ray topographs. These observations show that long-range strain interactions due to applied fields are present around domain walls long before permanent changes are induced.

Keywords

linbo3 crystals;; microscopy;; litao3;; nonstoichiometry;; perovskites;; topography;; tantalate;; model

Date of this Version

January 2004

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.