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Evidence of polarization switching induced by magnetic field in BiFeO 3 thin film

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Abstract

A BiFeO3 thin film was prepared on the (111) Pt/Ti/SiO 2/Si substrate by the solution coating method. In order to detect the effect of an external magnetic field on the BiFeO3 thin film, a fine scan X-ray diffraction with a scan ratio of 0.002°/s was carried out under the magnetic field parallel to the film surface. The result of the in situ analysis of X-ray diffraction for the thin film in the magnetic field indicates that the magnetic field leads to an increase of the integral intensity ratio of I{(110)}/I{(\overline 110)} compared with that under no magnetic field. The increase of I{(110)}/I{(\overline 110)} implies a domain switching under the magnetic field, where the domain switching comes from the decreasing residual tensile stress induced by the magnetostriction of BiFeO3 in the magnetic field.

Original languageEnglish
Article number1350077
JournalModern Physics Letters B
Volume27
Issue number11
DOIs
StatePublished - 10 May 2013
Externally publishedYes

Keywords

  • Domain switching
  • in situ X-ray diffraction
  • magnetostriction
  • residual stress

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