Defect-domain wall interactions in trigonal ferroelectrics

Venkatraman Gopalan, Volkmar Dierolf, David A. Scrymgeour

Research output: Chapter in Book/Report/Conference proceedingChapter

193 Scopus citations


Domains and domain walls are a fundamental property of interest in ferroelectrics, magnetism, ferroelastics, superconductors, and multiferroic materials. Unlike magnetic Bloch walls, ideal ferroelectric domain walls are well accepted to be only one to two lattice units wide, over which polarization and strain change across the wall. However, walls in real ferroelectrics appear to show unexpected property variations in the vicinity of domain walls that can extend over micrometer length scales. This chapter specifically reviews the local electrical, elastic, optical, and structural properties of antiparallel domain walls in the trigonal ferroelectrics lithium niobate and lithium tantalate. It is shown that extrinsic point defects and their clustering play a key role in the observed local wall structure and influence macroscale properties by orders of magnitude. The review also raises broader and yet unexplored fundamental questions regarding intrinsic widths, defect-domain wall interactions, and static versus dynamic wall structure.

Original languageEnglish (US)
Title of host publicationAnnual Review of Materials Research
EditorsDavid Clarke, Manfred Ruehle, Venkatraman Gopalan
Number of pages41
StatePublished - 2007

Publication series

NameAnnual Review of Materials Research
ISSN (Print)1531-7331

All Science Journal Classification (ASJC) codes

  • General Materials Science


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