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Hybrid supercapacitors for reversible control of magnetism

Molinari, Alan 1; Leufke, Philipp M. 1; Reitz, Christian 1; Dasgupta, Subho 1; Witte, Ralf 1; Kruk, Robert 1; Hahn, Horst 1
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)


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.

Volltext §
DOI: 10.5445/IR/1000070578
DOI: 10.1038/ncomms15339
Zitationen: 49
Web of Science
Zitationen: 48
Zitationen: 52
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2017
Sprache Englisch
Identifikator ISSN: 2041-1723
KITopen-ID: 1000070578
HGF-Programm 43.22.01 (POF III, LK 01) Functionality by Design
Erschienen in Nature Communications
Verlag Nature Research
Band 8
Seiten Art. Nr.: 15339
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagwörter Chemical physicsMagnetic properties and materialsSurfaces, interfaces and thin films
Nachgewiesen in Dimensions
Web of Science
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