Nanoscale analysis of dispersive ferroelectric domains in bulk of hexagonal multiferroic ceramics

Ali Baghizadeh, Joaquim M. Vieira, Daniel G. Stroppa, Marc Georg Willinger, Vitor S. Amaral

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The atomic nature of topologically protected ferroelectric (FE) walls in hexagonal ReMnO3 oxides (R: Sc, Y, Er, Ho, Yb, Lu) creates an interesting playground to study effects of defects on domain walls. The 6-fold FE vortices in this multiferroic family lose the ordering by the rule of 6 in the presence of partial edge dislocations (PED) besides it can be modified by chemical doping. Therefore, it is essential to comprehend the cross coupling of FE walls and defects or vacancies in the lattice of multiferroics. Atomic resolution STEM is used to explore the correlative response of electrical polarization of FE domains in the presence of defects in multiferroic ceramics. Such level of resolution also allows the study of switching of FE domains on encounter of lattice defects. The driving force behind appearance of dispersed, small FE domains in images of piezo force microscopy is revealed by observation of lattice defects and FE boundaries simultaneously at the nano-scale. Planar defects and FE domain walls play their role of internal interfaces consequently such interplaying duly modifies the magnetic and FE properties of multiferroic oxides.

Original languageEnglish
Pages (from-to)347-352
Number of pages6
JournalMaterials Characterization
Volume145
DOIs
StatePublished - Nov 2018
Externally publishedYes

Keywords

  • Aberration corrected STEM
  • Defective lattices
  • Ferroelectric domains
  • Multiferroic oxides

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