Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.027201
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Funding
- SRC NRI-WIN program
- Office of Science, Office of Basic Energy Sciences, Materials Sciences Division of the U.S. Department of Energy [DE-AC02-05CH11231]
- U.S. DOE, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- Division of Materials Sciences and Engineering, Office of Basic Energy Sciences, U.S. Department of Energy
- National Science Council,, R. O. C [NSC98-2119-M-009-016]
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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 L-2,L-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.
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