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The magnetoelectrochemical switch

Lunca Popa, P.; Kemp, Neil T.; Majjad, Hicham; Dalmas, Guillaume; Faramarzi, Vina; Andreas, Christian; Hertel, Riccardo; Doudin, Bernard


P. Lunca Popa

Neil T. Kemp

Hicham Majjad

Guillaume Dalmas

Vina Faramarzi

Christian Andreas

Riccardo Hertel

Bernard Doudin


In the field of spintronics, the archetype solid-state two-terminal device is the spin valve, where the resistance is controlled by the magnetization configuration. We show here how this concept of spin-dependent switch can be extended to magnetic electrodes in solution, by magnetic control of their chemical environment. Appropriate nanoscale design allows a huge enhancement of the magnetic force field experienced by paramagnetic molecular species in solutions, which changes between repulsive and attractive on changing the electrodes' magnetic orientations. Specifically, the field gradient force created within a sub-100-nm-sized nanogap separating two magnetic electrodes can be reversed by changing the orientation of the electrodes' magnetization relative to the current flowing between the electrodes. This can result in a breaking or making of an electric nanocontact, with a change of resistance by a factor of up to 103. The results reveal how an external field can impact chemical equilibrium in the vicinity of nanoscale magnetic circuits.


Lunca Popa, P., Kemp, N. T., Majjad, H., Dalmas, G., Faramarzi, V., Andreas, C., …Doudin, B. (2014). The magnetoelectrochemical switch. Proceedings of the National Academy of Sciences of the United States of America, 111(29), 10433-10437.

Acceptance Date Jun 20, 2014
Online Publication Date Jul 9, 2014
Publication Date Jul 22, 2014
Deposit Date Jul 28, 2015
Publicly Available Date Jul 28, 2015
Journal Proceedings of the National Academy of Sciences
Print ISSN 0027-8424
Electronic ISSN 1091-6490
Publisher National Academy of Sciences
Peer Reviewed Peer Reviewed
Volume 111
Issue 29
Pages 10433-10437
Keywords Magnetohydrodynamics, Spintronics, Supramolecular chemistry
Public URL
Publisher URL
Additional Information Author's accepted manuscript of article published in: Proceedings of the National Academy of Sciences, 2014, v.111, issue 29.


pnas(Kemp)_accepted_version.pdf (526 Kb)

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©2015 University of Hull

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