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Polarization screening-induced magnetic phase gradients at complex oxide interfaces

Author

Listed:
  • Steven R. Spurgeon

    (Drexel University)

  • Prasanna V. Balachandran

    (Drexel University
    Present address: Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA)

  • Despoina M. Kepaptsoglou

    (SuperSTEM, SciTech Daresbury Campus, Daresbury)

  • Anoop R. Damodaran

    (University of California, Berkeley)

  • J. Karthik

    (University of Illinois, Urbana-Champaign, Urbana, Illinois 61801, USA)

  • Siamak Nejati

    (Drexel University)

  • Lewys Jones

    (University of Oxford)

  • Haile Ambaye

    (Neutron Sciences Directorate, Oak Ridge National Laboratory)

  • Valeria Lauter

    (Neutron Sciences Directorate, Oak Ridge National Laboratory)

  • Quentin M. Ramasse

    (SuperSTEM, SciTech Daresbury Campus, Daresbury)

  • Kenneth K. S. Lau

    (Drexel University)

  • Lane W. Martin

    (University of California, Berkeley
    Lawrence Berkeley National Laboratory)

  • James M. Rondinelli

    (Northwestern University)

  • Mitra L. Taheri

    (Drexel University)

Abstract

Thin-film oxide heterostructures show great potential for use in spintronic memories, where electronic charge and spin are coupled to transport information. Here we use a La0.7Sr0.3MnO3 (LSMO)/PbZr0.2Ti0.8O3 (PZT) model system to explore how local variations in electronic and magnetic phases mediate this coupling. We present direct, local measurements of valence, ferroelectric polarization and magnetization, from which we map the phases at the LSMO/PZT interface. We combine these experimental results with electronic structure calculations to elucidate the microscopic interactions governing the interfacial response of this system. We observe a magnetic asymmetry at the LSMO/PZT interface that depends on the local PZT polarization and gives rise to gradients in local magnetic moments; this is associated with a metal–insulator transition at the interface, which results in significantly different charge-transfer screening lengths. This study establishes a framework to understand the fundamental asymmetries of magnetoelectric coupling in oxide heterostructures.

Suggested Citation

  • Steven R. Spurgeon & Prasanna V. Balachandran & Despoina M. Kepaptsoglou & Anoop R. Damodaran & J. Karthik & Siamak Nejati & Lewys Jones & Haile Ambaye & Valeria Lauter & Quentin M. Ramasse & Kenneth , 2015. "Polarization screening-induced magnetic phase gradients at complex oxide interfaces," Nature Communications, Nature, vol. 6(1), pages 1-11, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7735
    DOI: 10.1038/ncomms7735
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    Cited by:

    1. Jinsol Seo & Hyungwoo Lee & Kitae Eom & Jinho Byun & Taewon Min & Jaekwang Lee & Kyoungjun Lee & Chang-Beom Eom & Sang Ho Oh, 2024. "Feld-induced modulation of two-dimensional electron gas at LaAlO3/SrTiO3 interface by polar distortion of LaAlO3," Nature Communications, Nature, vol. 15(1), pages 1-11, December.

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