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Hybrid supercapacitors for reversible control of magnetism

Author

Listed:
  • Alan Molinari

    (Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT))

  • Philipp M. Leufke

    (Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT))

  • Christian Reitz

    (Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT))

  • Subho Dasgupta

    (Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT)
    Present address: Department of Materials Engineering, Indian Institute of Science (IISc), Bangalore 560012, India)

  • Ralf Witte

    (Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT))

  • Robert Kruk

    (Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT))

  • Horst Hahn

    (Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT)
    KIT-TUD-Joint Research Laboratory Nanomaterials, Technical University Darmstadt)

Abstract

Electric field tuning of magnetism is one of the most intensely pursued research topics of recent times aiming at the development of new-generation low-power spintronics and microelectronics. However, a reversible magnetoelectric effect with an on/off ratio suitable for easy and precise device operation is yet to be achieved. Here we propose a novel route to robustly tune magnetism via the charging/discharging processes of hybrid supercapacitors, which involve electrostatic (electric-double-layer capacitance) and electrochemical (pseudocapacitance) doping. We use both charging mechanisms—occurring at the La0.74Sr0.26MnO3/ionic liquid interface to control the balance between ferromagnetic and non-ferromagnetic phases of La1−xSrxMnO3 to an unprecedented extent. A magnetic modulation of up to ≈33% is reached above room temperature when applying an external potential of only about 2.0 V. Our case study intends to draw attention to new, reversible physico-chemical phenomena in the rather unexplored area of magnetoelectric supercapacitors.

Suggested Citation

  • Alan Molinari & Philipp M. Leufke & Christian Reitz & Subho Dasgupta & Ralf Witte & Robert Kruk & Horst Hahn, 2017. "Hybrid supercapacitors for reversible control of magnetism," Nature Communications, Nature, vol. 8(1), pages 1-9, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15339
    DOI: 10.1038/ncomms15339
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