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26 April 2024

» arxiv » 1006.1194

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Interface ferromagnetism and orbital reconstruction in BiFeO3- La0.7Sr0.3MnO3 heterostructures
P. Yu ; J. -S. Lee ; S. Okamoto ; M. D. Rossell ; M. Huijben ; C. -H. Yang ; Q. He ; J. -X. Zhang ; S. Y. Yang ; M. J. Lee ; Q. M. Ramasse ; R. Erni ; Y.-H. Chu ; D. A. Arena ; C. -C. Kao ; L. W. Martin ; R. Ramesh ;
Date:	7 Jun 2010
Abstract:	We report the formation of a novel ferromagnetic state in the antiferromagnet BiFeO3 at the interface with 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 with an electronic orbital reconstruction at the interface, which is supported by the linearly polarized x-ray absorption measurement at oxygen K-edge.
Source:	arXiv, 1006.1194
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