Magnetic Structuring of Electrodeposits

Peter Dunne, Lorenzo Mazza, and J. M. D. Coey
Phys. Rev. Lett. 107, 024501 – Published 5 July 2011

Abstract

Metal electrodeposition reflects the pattern of the magnetic field at the cathode surface created by a magnet array. For deposits from paramagnetic cations such as Co2+ or Cu2+, the effect is explained in terms of magnetic pressure which modifies the thickness of the diffusion layer, that governs their mass transport. An inverse effect allows deposits to be structured in complementary patterns when a strongly paramagnetic but nonelectroactive cation such as Dy3+ is present in the electrolyte, and is related to inhibition of convection of water liberated at the cathode, in the inhomogeneous magnetic field. The magnetic structuring depends on the susceptibility of the electroactive species relative to that of the nonelectroactive background.

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  • Received 15 April 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.024501

© 2011 American Physical Society

Authors & Affiliations

Peter Dunne, Lorenzo Mazza, and J. M. D. Coey

  • School of Physics and CRANN, Trinity College, Dublin 2, Ireland

Comments & Replies

Comment on “Magnetic Structuring of Electrodeposits”

Gerd Mutschke, Kristina Tschulik, Margitta Uhlemann, Andreas Bund, and Jochen Fröhlich
Phys. Rev. Lett. 109, 229401 (2012)

Dunne and Coey Reply:

Peter Dunne and J. M. D. Coey
Phys. Rev. Lett. 109, 229402 (2012)

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Issue

Vol. 107, Iss. 2 — 8 July 2011

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