Hybrid supercapacitors for reversible control of magnetism
#MMPMID28489078
Molinari A
; Leufke PM
; Reitz C
; Dasgupta S
; Witte R
; Kruk R
; Hahn H
Nat Commun
2017[May]; 8
(?): 15339
PMID28489078
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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(0.74)Sr(0.26)MnO(3)/ionic liquid interface to control the balance between
ferromagnetic and non-ferromagnetic phases of La(1-x)Sr(x)MnO(3) 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.
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