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Phys Rev Lett. 2014 Jul 25;113(4):047204. Epub 2014 Jul 24.

Induced magnetization in La0.7Sr0.3MnO3/BiFeO3 superlattices.

Author information

  • 1Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA and Solid State Physics Division, Bhabha Atomic Research Center, Mumbai 400085, India.
  • 2Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA and Department of Physics and Astronomy, James Madison University, Harrisonburg, Virginia 22807, USA.
  • 3Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA and State Key Lab of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610051, China.
  • 4Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ, United Kingdom.
  • 5Sandia National Laboratory, Albuquerque, New Mexico 87185, USA.
  • 6Department of Materials Science and Engineering, University of California at Berkeley, Berkeley, California 94720, USA.
  • 7Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • 8Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77843, USA.

Abstract

Using polarized neutron reflectometry, we observe an induced magnetization of 75 ± 25 kA/m at 10 K in a La(0.7)Sr(0.3)MnO(3) (LSMO)/BiFeO(3) superlattice extending from the interface through several atomic layers of the BiFeO(3) (BFO). The induced magnetization in BFO is explained by density functional theory, where the size of band gap of BFO plays an important role. Considering a classical exchange field between the LSMO and BFO layers, we further show that magnetization is expected to extend throughout the BFO, which provides a theoretical explanation for the results of the neutron scattering experiment.

PMID:
25105651
[PubMed - in process]
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