Interface ferromagnetism and orbital reconstruction in BiFeO3-La(0.7)Sr(0.3)MnO3 heterostructures

We report the formation of a novel ferromagnetic state in the antiferromagnet BiFeO3 at the interface with ferromagnet La(0.7)Sr(0.3)MnO3. Using x-ray magnetic circular dichroism at Mn and Fe L(2,3) edges, we discovered that the development of this ferromagnetic spin structure is strongly associated...

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Bibliographic Details
Published in:Physical review letters 2010-07, Vol.105 (2), p.027201-027201
Main Authors: Yu, P, Lee, J-S, Okamoto, S, Rossell, M D, Huijben, M, Yang, C-H, He, Q, Zhang, J X, Yang, S Y, Lee, M J, Ramasse, Q M, Erni, R, Chu, Y-H, Arena, D A, Kao, C-C, Martin, L W, Ramesh, R
Format: Article
Language:English
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Summary:We report the formation of a novel ferromagnetic state in the antiferromagnet BiFeO3 at the interface with ferromagnet La(0.7)Sr(0.3)MnO3. Using x-ray magnetic circular dichroism at Mn and Fe L(2,3) 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.
ISSN:1079-7114