Hybrid supercapacitors for reversible control of magnetism.

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 La_0.74Sr_0.26MnO₃/ionic liquid interface to control the balance between ferromagnetic and non-ferromagnetic phases of La_1-xSr_xMnO₃ 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.

SUBMITTER: Molinari A 

PROVIDER: S-EPMC5436217 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature