Berlin 2018 – wissenschaftliches Programm

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SYVC: Symposium Voltage Control of Functional Interfaces: Magneto-ionic Meet Memristive Systems

SYVC 1: SYVC: Voltage Control of Functional Interfaces – Magneto-ionic Meet Memristive Systems

SYVC 1.5: Hauptvortrag

Mittwoch, 14. März 2018, 17:30–18:00, H 0105

Reversible chemistry as a tool for dynamic control of physical properties — •Robert Kruk, Subho Dasgupta, Bijoy Das, and Horst Hahn — 1Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany

The idea of control of magnetic properties with reversible chemistry rests on a non-destructive, cyclic insertion (and extraction) of mobile ions into a magnetic lattice followed by a reversible chemical reaction with the magnetic ions, thus resulting in a radical change in the magnetic state of the material. This new approach to control magnetic response in a material via electrochemistry goes beyond surface and interface effects and applies to any volume of magnetic materials. Moreover, aiming at a complete on-and-off magnetic switching, reversible ion-exchange processes can be utilized as a tool to annihilate magnetism in bulk ferromagnets or to create magnetism in non-magnetic systems. This presentation provides background and discusses key issues in practical realization of electrochemically tunable systems. Selected examples of successful applications of the ion- insertion control principle are presented, including reversible control of magnetic states in spinels [1].


[1] Dasgupta, S.; Das, B.; Li, Q.; Wang, D.; Baby, T. T.; Indris, S.; Knapp, M.; Ehrenberg, H.; Fink, K.; Kruk, R.; Hahn, H.; Advanced functional materials, 26 (41), 7507 (2016).

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