Direct observation of interlocked domain walls in hexagonal RMnO 3 (R=Tm, Lu)

Q. H. Zhang, L. J. Wang, X. K. Wei, R. C. Yu, L. Gu, Akihiko Hirata, M. W. Chen, C. Q. Jin, Y. Yao, Y. G. Wang, X. F. Duan

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Abstract

Using state-of-the-art aberration-corrected annular-bright-field and high-angle annular-dark-field scanning transmission electron microscopy, we investigated domain wall structures in multiferroic hexagonal TmMnO 3 and LuMnO 3 ceramics at the atomic scale. Two types of 180°domain walls (DWs), i.e., the transverse and the longitudinal DWs with uniform displacements of a/3 and 2a/3, respectively, were identified along the b direction, which is in agreement with the interlock between the ferroelectric and structural translation domain walls that had been predicted previously. Across the domain wall the arrangement of MnO 5 polyhedra was not found to be inversed, indicating that (i) it has negligible effects on the polarization and (ii) the structures of the neighbor domains with opposite polarizations are not exactly the same. These wall structures are different from the polarization inversion in conventional ferroelectrics and may be used to explain the unusual transport properties and magnetoelectic effects.

Original languageEnglish
Article number020102
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number2
DOIs
Publication statusPublished - 2012 Jan 9
Externally publishedYes

Fingerprint

Domain walls
domain wall
Polarization
Ferroelectric materials
polarization
polyhedrons
Aberrations
Transport properties
aberration
transport properties
ceramics
inversions
Transmission electron microscopy
transmission electron microscopy
Scanning electron microscopy
scanning electron microscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Direct observation of interlocked domain walls in hexagonal RMnO 3 (R=Tm, Lu). / Zhang, Q. H.; Wang, L. J.; Wei, X. K.; Yu, R. C.; Gu, L.; Hirata, Akihiko; Chen, M. W.; Jin, C. Q.; Yao, Y.; Wang, Y. G.; Duan, X. F.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 85, No. 2, 020102, 09.01.2012.

Research output: Contribution to journalArticle

Zhang, QH, Wang, LJ, Wei, XK, Yu, RC, Gu, L, Hirata, A, Chen, MW, Jin, CQ, Yao, Y, Wang, YG & Duan, XF 2012, 'Direct observation of interlocked domain walls in hexagonal RMnO 3 (R=Tm, Lu)', Physical Review B - Condensed Matter and Materials Physics, vol. 85, no. 2, 020102. https://doi.org/10.1103/PhysRevB.85.020102
Zhang, Q. H. ; Wang, L. J. ; Wei, X. K. ; Yu, R. C. ; Gu, L. ; Hirata, Akihiko ; Chen, M. W. ; Jin, C. Q. ; Yao, Y. ; Wang, Y. G. ; Duan, X. F. / Direct observation of interlocked domain walls in hexagonal RMnO 3 (R=Tm, Lu). In: Physical Review B - Condensed Matter and Materials Physics. 2012 ; Vol. 85, No. 2.
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