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Media type:
E-Article
Title:
Hybrid supercapacitors for reversible control of magnetism
Contributor:
Molinari, Alan;
Leufke, Philipp M.;
Reitz, Christian;
Dasgupta, Subho;
Witte, Ralf;
Kruk, Robert;
Hahn, Horst
imprint:
Springer Science and Business Media LLC, 2017
Published in:Nature Communications
Language:
English
DOI:
10.1038/ncomms15339
ISSN:
2041-1723
Origination:
Footnote:
Description:
<jats:title>Abstract</jats:title><jats:p>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 La<jats:sub>0.74</jats:sub>Sr<jats:sub>0.26</jats:sub>MnO<jats:sub>3</jats:sub>/ionic liquid interface to control the balance between ferromagnetic and non-ferromagnetic phases of La<jats:sub>1−<jats:italic>x</jats:italic></jats:sub>Sr<jats:sub><jats:italic>x</jats:italic></jats:sub>MnO<jats:sub>3</jats:sub> 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.</jats:p>