Domain Wall Conductivity in La-Doped BiFeO3

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The transport physics of domain wall conductivity in La-doped bismuth ferrite (BiFeO3) has been probed using variable temperature conducting atomic force microscopy and piezoresponse force microscopy in samples with arrays of domain walls in the as-grown state. Nanoscale current measurements are investigated as a function of bias and temperature and are shown to be consistent with distinct electronic properties at the domain walls leading to changes in the observed local conductivity. Our observation is well described within a band picture of the observed electronic conduction. Finally, we demonstrate an additional degree of control of the wall conductivity through chemical doping with oxygen vacancies, thus influencing the local conductive state.
Publisher
AMER PHYSICAL SOC
Issue Date
2010-11
Language
English
Article Type
Article
Keywords

FERROELECTRIC-FILMS; BULK

Citation

PHYSICAL REVIEW LETTERS, v.105, no.19

ISSN
0031-9007
DOI
10.1103/PhysRevLett.105.197603
URI
http://hdl.handle.net/10203/97053
Appears in Collection
PH-Journal Papers(저널논문)
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