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Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis
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Domain wall conductivity in La-doped BiFeO3.

J Seidel1, P Maksymovych, Y Batra

  • 1Department of Physics, University of California, Berkeley, California 94720, USA.

Physical Review Letters
|January 15, 2011
PubMed
Summary
This summary is machine-generated.

Domain wall conductivity in La-doped bismuth ferrite was investigated. Distinct electronic properties at domain walls influence local conductivity, which can be tuned by doping with oxygen vacancies.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Bismuth ferrite (BiFeO3) is a multiferroic material with potential applications in electronic devices.
  • Domain walls in ferroelectric materials can exhibit unique electronic and magnetic properties.
  • Understanding domain wall conductivity is crucial for novel device functionalities.

Purpose of the Study:

  • To probe the transport physics of domain wall conductivity in La-doped BiFeO3.
  • To investigate the influence of distinct electronic properties at domain walls on local conductivity.
  • To explore methods for controlling domain wall conductivity.

Main Methods:

  • Variable temperature conducting atomic force microscopy (CAFM).
  • Piezoresponse force microscopy (PFM).
  • Nanoscale current measurements as a function of bias and temperature.

Main Results:

  • Domain walls in La-doped BiFeO3 exhibit distinct electronic properties affecting local conductivity.
  • Observed conductivity is consistent with a band picture of electronic conduction.
  • Chemical doping with oxygen vacancies provides an additional control over wall conductivity.

Conclusions:

  • Domain wall conductivity in La-doped BiFeO3 is governed by specific electronic properties.
  • Band theory effectively describes the observed electronic conduction at domain walls.
  • Oxygen vacancy doping offers a pathway to modulate the conductive state of domain walls.