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Spin regulation in composite spin-filter barrier devices

Author

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  • Guo-Xing Miao

    (Francis Bitter Magnet Lab, Massachusetts Institute of Technology
    University of Waterloo)

  • Joonyeon Chang

    (Francis Bitter Magnet Lab, Massachusetts Institute of Technology
    Spin Convergence Research Center, Korea Institute of Science and Technology)

  • Badih A. Assaf

    (Northeastern University)

  • Donald Heiman

    (Northeastern University)

  • Jagadeesh S. Moodera

    (Francis Bitter Magnet Lab, Massachusetts Institute of Technology
    Massachusetts Institute of Technology)

Abstract

Magnetic insulators are known to provide large effective Zeeman fields that are confined at an interface, making them especially powerful in modifying adjacent one- or two-dimensional electronic structures. Utilizing this phenomenon and the other important property of magnetic insulators—spin filtering—here we report the generation and subsequent detection of a large interface field, as large as tens of tesla in EuS/Al/EuS heterostructures with metallic coulomb islands confined within a magnetic insulator barrier. The unique energy profile across this sandwich structure produces spin-assisted charge transfer across the device, generating a spontaneous spin current and voltage. These unique properties can be practical for controlling spin flows in electronic devices and for energy harvesting.

Suggested Citation

  • Guo-Xing Miao & Joonyeon Chang & Badih A. Assaf & Donald Heiman & Jagadeesh S. Moodera, 2014. "Spin regulation in composite spin-filter barrier devices," Nature Communications, Nature, vol. 5(1), pages 1-6, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4682
    DOI: 10.1038/ncomms4682
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