Direct observation of the proliferation of ferroelectric loop domains and vortex-antivortex pairs.

  title={Direct observation of the proliferation of ferroelectric loop domains and vortex-antivortex pairs.},
  author={Seung Chul Chae and Nara Lee and Y. Horibe and Makoto Tanimura and Shigeo Mori and Bin Gao and Scott V. Carr and S. -W. Cheong},
  journal={Physical review letters},
  volume={108 16},
We discovered stripe patterns of trimerization-ferroelectric domains in hexagonal REMnO(3) (RE=Ho,···,Lu) crystals (grown below ferroelectric transition temperatures (T(c)), reaching up to 1435 °C), in contrast with the vortex patterns in YMnO(3). These stripe patterns roughen with the appearance of numerous loop domains through thermal annealing just below T(c), but the stripe domain patterns turn to vortex-antivortex domain patterns through a freezing process when crystals cross T(c) even… 

Direct Observation of Multiferroic Vortex Domains in YMnO3

The structure of multiferroic vortex domains in YMnO3 at atomic scale is reported using state-of-the-art aberration-corrected scanning transmission electron microscopy (STEM) and the anti-vortex core is found to be about four unit cells wide.

Ferroelectric annular domains in hexagonal manganites

Experimental observations and theoretical simulations for the ferroelectric (FE) domains in multiferroic RMnO3 (R=Ho-Lu, Y, and Sc) demonstrate that annular domains can appear in the topological

Self-poling with oxygen off-stoichiometry in ferroelectric hexagonal manganites

Topological vortices with complex domains and domain walls exist in hexagonal manganites, which undergo a structural transition accompanying ferroelectric polarization and trimerization. We have

Topology breaking of the vortex in multiferroic Y0.67Lu0.33MnO3

Although topological defects, such as domain walls (DWs) or vortices, are naturally protected by topological invariance, yet, we discover an exception that the six-state topology of the vortex with

Suppression of vortex–antivortex structures by anti-trimer point defects in hexagonal manganites

The topologically protected vortex–antivortex (V–AV) domain structure in ferroelectric hexagonal manganites has been highly concerned recently, but its stability against intrinsic defects remains to

Direct observation of interlocked domain walls and topological four-state vortex-like domain patterns in multiferroic YMnO3 single crystal

Using the advanced spherical aberration-corrected high angle annular dark field scanning transmission electron microscope imaging techniques, we investigated atomic-scale structural features of

Topological dynamics of vortex-line networks in hexagonal manganites

The two-dimensional $XY$ model is the first well-studied system with topological point defects. On the other hand, although topological line defects are common in three-dimensional systems, the

Domain patterns and electric properties at domain walls in a surface normal to the direction of ferroelectric polarization in h-ErMnO3

  • S. Chae
  • Physics, Materials Science
  • 2015
The configuration of ferroelectric domains in a plane normal to the direction of ferroelectric polarization in hexagonal ErMnO3 (h-ErMnO3) was investigated using piezoresponse force microscopy and a

A Monte-Carlo Study on the Coupling of Magnetism and Ferroelectricity in the Hexagonal Multiferroic RMnO 3

The ferroelectric phase transition in RMnO3 breaks both Z3 and Z2 symmetries, giving rise to 6 structural domains. Topological protected vortices are formed at the junctions of all 6 domains, and the

Topological defects as relics of emergent continuous symmetry and Higgs condensation of disorder in ferroelectrics

Lars Onsager and Richard Feynman envisaged that the three-dimensional (3D) superfluid-to-normal λ transition in 4He occurs through the proliferation of vortices. This process should hold for every



Magnetic Domains: The Analysis of Magnetic Microstructures

Domain Observation Techniques.- Domain Theory.- Material Parameters for Domain Analysis.- Domain Observation and Interpretation.- The Relevance of Domains.

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