Hybrid supercapacitors for reversible control of magnetism

Molinari, Alan and Leufke, Philipp M and Reitz, Christian and Dasgupta, Subho and Witte, Ralf and Kruk, Robert and Hahn, Horst (2017) Hybrid supercapacitors for reversible control of magnetism. In: NATURE COMMUNICATIONS, 8 .

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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 approximate 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.

Item Type:	Journal Article
Additional Information:	Copy right for this article belongs to the NATURE PUBLISHING GROUP, MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User:	Id for Latest eprints
Date Deposited:	03 Jun 2017 09:33
Last Modified:	03 Jun 2017 09:33
URI:	http://eprints.iisc.ac.in/id/eprint/57086

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