Interface ferromagnetism and orbital reconstruction in BiFeO3-La0.7Sr0.3MnO3 heterostructures

P. Yu, J.S. Lee, S. Okamoto, M.D. Rossell, Mark Huijben, C.H. Yang, Q. He, Qiwei He, J.X. Zhang, S.Y. Yang, M.J. Lee, Q.M. Ramasse, R. Emi, Y.H. Chu, D.A. Arena, C.C. Kao, L.W. Martin, R. Ramesh

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Abstract

We report the formation of a novel ferromagnetic state in the antiferromagnet BiFeO3 at the interface with ferromagnet La0.7Sr0.3MnO3. Using x-ray magnetic circular dichroism at Mn and Fe L2,3 edges, we discovered that the development of this ferromagnetic spin structure is strongly associated with the onset of a significant exchange bias. Our results demonstrate that the magnetic state is directly related to an electronic orbital reconstruction at the interface, which is supported by the linearly polarized x-ray absorption measurement at the oxygen K edge
Original languageEnglish
Pages (from-to)027201-
Number of pages5
JournalPhysical review letters
Volume105
Issue number2
DOIs
Publication statusPublished - 2010

Keywords

  • METIS-269428
  • IR-75249

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