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Title: Insight into spin transport in oxide heterostructures from interface-resolved magnetic mapping

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms7306· OSTI ID:1265457
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  1. Centre National de la Recherche Scientifique (CNRS)/Thales, Palaiseau (France). Unite Mixte de Physique and Univ. Paris-Sud, Orsay
  2. Helmholtz-Zentrum Berlin (HZB), (Germany). German Research Centre for Materials and Energy
  3. Univ. Complutense Madrid (Spain). Dept. Fisica Aplicada III; Unidad Asociada CSIC/Univ. Complutense Madrid (Spain). Lab. de Heterostructuras con aplicacion en Spintronica; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology
  4. Helmholtz-Zentrum Berlin (HZB), (Germany). German Research Centre for Materials and Energy; Ruhr Univ., Bochum (Germany). Inst. fuer Experimentalphysik/Festkoeperphysik
  5. Univ. Complutense Madrid (Spain). Dept. Fisica Aplicada III; Unidad Asociada CSIC/Univ. Complutense Madrid (Spain). Lab. de Heterostructuras con aplicacion en Spintronica
  6. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering

At interfaces between complex oxides, electronic, orbital and magnetic reconstructions may produce states of matter absent from the materials involved, offering novel possibilities for electronic and spintronic devices. Here we show that magnetic reconstruction has a strong influence on the interfacial spin selectivity, a key parameter controlling spin transport in magnetic tunnel junctions. In epitaxial heterostructures combining layers of antiferromagnetic LaFeO3 (LFO) and ferromagnetic La0.7Sr0.3MnO3 (LSMO), we find that a net magnetic moment is induced in the first few unit planes of LFO near the interface with LSMO. Using X-ray photoemission electron microscopy, we show that the ferromagnetic domain structure of the manganite electrodes is imprinted into the antiferromagnetic tunnel barrier, endowing it with spin selectivity. Finally, we find that the spin arrangement resulting from coexisting ferromagnetic and antiferromagnetic interactions strongly influences the tunnel magnetoresistance of LSMO/LFO/LSMO junctions through competing spin-polarization and spin-filtering effects.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1265457
Journal Information:
Nature Communications, Vol. 6; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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Cited By (6)

Controlling the Magnetic Properties of LaMnO 3 /SrTiO 3 Heterostructures by Stoichiometry and Electronic Reconstruction: Atomic‐Scale Evidence journal May 2019
Controllable spiking dynamics in cascaded VCSEL-SA photonic neurons journal November 2019
Magneto-dynamic properties of complex oxide—La 0.7 Sr 0.3 MnO 3 /SrTiO 3 —heterostructure interface journal June 2019
Impact of growth kinetics on the interface morphology and magnetization in La 1/3 Sr 2/3 FeO 3 /La 2/3 Sr 1/3 MnO 3 heterostructures journal January 2020
Low-field switching of noncollinear spin texture at L a 0.7 S r 0.3 Mn O 3 SrRu O 3 interfaces journal January 2019
Impact of growth kinetics on the interface morphology and magnetization in La 1/3 Sr 2/3 FeO 3 /La 2/3 Sr 1/3 MnO 3 heterostructures text January 2020

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