Jump to main content
Jump to site search

Issue 46, 2013
Previous Article Next Article

Manipulation of domain wall mobility by oxygen vacancy ordering in multiferroic YMnO3

Author affiliations

Abstract

The mobility of the ferroelectric domain phases and the local conductivity of ferroelectric domain walls in multiferroic YMnO3 crystals grown in air and reduced atmosphere were studied by piezoresponse force microscopy (PFM), tip-enhanced Raman spectroscopy (TERS) and conductive atomic force microscopy (CAFM). Oxygen vacancies were found to reduce the strength of 4d–2p (Y3+–O2−) hybridization and structural trimerization distortion, leading to the disappearance of the six wedge-shaped ferroelectric domain phases in oxygen deficient YMnO3−δ crystals. We observed anisotropic domain wall motion such that the wedge-shaped domain configuration joined at one point could be changed to the stripe domain configuration by applying high electric fields in oxygen deficient YMnO3−δ single crystals. The local conductivity of the domain walls increased significantly in poled YMnO3−δ single crystals. The straight conductive domain walls in YMnO3−δ, instead of the twisted insulating ones in the stoichiometric crystal, are induced by the ordered oxygen vacancies which are verified by TERS measurements.

Graphical abstract: Manipulation of domain wall mobility by oxygen vacancy ordering in multiferroic YMnO3

Back to tab navigation

Publication details

The article was received on 10 Jul 2013, accepted on 28 Aug 2013 and first published on 29 Aug 2013


Article type: Paper
DOI: 10.1039/C3CP52892H
Citation: Phys. Chem. Chem. Phys., 2013,15, 20010-20015
  •   Request permissions

    Manipulation of domain wall mobility by oxygen vacancy ordering in multiferroic YMnO3

    Y. Du, X. Wang, D. Chen, Y. Yu, W. Hao, Z. Cheng and S. X. Dou, Phys. Chem. Chem. Phys., 2013, 15, 20010
    DOI: 10.1039/C3CP52892H

Search articles by author

Spotlight

Advertisements