Hybrid supercapacitors for reversible control of magnetism.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 28489078.
- Also identified by DOI 10.1038/ncomms15339 and PMC identifier 5436217.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
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<sub>0.74</sub>Sr<sub>0.26</sub>MnO<sub>3</sub>/ionic liquid interface to control the balance between ferromagnetic and non-ferromagnetic phases of La<sub>1-x</sub>Sr<sub>x</sub>MnO<sub>3</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.