Domain Wall Conductivity in Oxygen Deficient Multiferroic YMnO3 Single Crystals

Details Domain Wall Conductivity in Oxygen Deficient Multiferroic YMnO3 Single Crystals Domain Wall Conductivity in Oxygen Deficient Multiferroic YMnO3 Single Crystals

2012-01-05

arxiv.org/abs/1201.1059v1

Physics

Condensed Matter

Materials Science

4 pages, 4 figures; Applied Physics Letters (2011)

Scientific paper

10.1063/1.3671393

The transport properties of domain walls in oxygen deficient multiferroic YMnO3 single crystals have been probed using conductive atomic force microscopy and piezoresponse force microscopy. Domain walls exhibit significantly enhanced conductance after being poled in electric fields, possibly induced by oxygen vacancy ordering at domain walls. The electronic conduction can be understood by the Schottky emission and Fowler-Nordheim tunnelling mechanisms. Our results show that the domain wall conductance can be modulated through band structure engineering by manipulating ordered oxygen vacancies in the poling fields.

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