Electric-field-induced spin flop in BiFeO3 single crystals at room temperature.

نویسندگان

  • D Lebeugle
  • D Colson
  • A Forget
  • M Viret
  • A M Bataille
  • A Gukasov
چکیده

Bismuth ferrite, BiFeO3, is the only known room-temperature magnetic ferroelectric material. We demonstrate here, using neutron scattering measurements in high quality single crystals, that the antiferromagnetic and ferroelectric order parameters are intimately coupled. Initially in a single ferroelectric state, our crystals have a canted antiferromagnetic structure describing a unique cycloid. Under electrical poling, polarization reorientation induces a spin flop. We argue here that the coupling between the two orders may be stronger in the bulk than in thin films where the cycloid is absent.

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عنوان ژورنال:
  • Physical review letters

دوره 100 22  شماره 

صفحات  -

تاریخ انتشار 2008