dc.contributor.author | COEY, JOHN | en |
dc.date.accessioned | 2014-04-16T15:25:11Z | |
dc.date.available | 2014-04-16T15:25:11Z | |
dc.date.issued | 2012 | en |
dc.date.submitted | 2012 | en |
dc.identifier.citation | Dunne, P, Coey, JMD, Patterning metallic electrodeposits with magnet arrays, Physical Review B - Condensed Matter and Materials Physics, 85, 2012, 224411- | en |
dc.identifier.other | Y | en |
dc.description | PUBLISHED | en |
dc.description.abstract | The influence of a pattern of a magnetic field on the structure of metal deposits at the cathode of a small
electrochemical cell is investigated for cobalt, nickel, copper, and zinc. The different magnetic properties of the
ions in their oxidized and reduced states, together with the influence on the patterned electrodeposits of variables,
including the structure of the array of small magnets used to generate the field pattern, applied magnetic field,
ion concentration, cell orientation, and deposition time lead to an understanding of the physical processes
involved. The results for direct deposits from paramagnetic cations such as Cu
2
+
when convection is minimized
are largely explained in terms of magnetic pressure, which modifies the thickness of the diffusion layer that
governs mass transport. Patterning is governed by the susceptibility of the electroactive species relative to the
nonelectroactive background. No patterning is observed until the diffusion layer begins to form, as it requires
orthogonal concentration and magnetic field gradients. An inverse effect, whereby deposits are structured in
complementary patterns, such as antidot arrays, is observed when a strongly paramagnetic but nonelectroactive
cationsuchasDy
3
+
is present in the electrolyte, together with an electroactive cation such as Cu
2
+
or Zn
2
.Inverse
patterningisrelatedtomagneticallyinducedconvectionproducedbytheinhomogeneousmagneticfield.Blocking
of sites in the double layer by the rare-earth ions may also be involved. The inverse deposits are concentrated in
regions where the magnitude of the field is lowest; they can also be produced directly by superposing a uniform
magnetic field on that of the magnet array | en |
dc.description.sponsorship | This work was supported by Science Foundation Ire-
land as part of the RFP and NISE projects, Contract No.
09/RFP/PHY2379 and 10/IN1/I3002. We thank Plamen Sta-
menov for much helpful criticism, and Karl Ackland for the
FIB cross sections | en |
dc.format.extent | 224411 | en |
dc.language.iso | en | en |
dc.relation.ispartofseries | Physical Review B - Condensed Matter and Materials Physics | en |
dc.relation.ispartofseries | 85 | en |
dc.rights | Y | en |
dc.subject | Physics | en |
dc.title | Patterning metallic electrodeposits with magnet arrays | en |
dc.type | Journal Article | en |
dc.type.supercollection | scholarly_publications | en |
dc.type.supercollection | refereed_publications | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/jcoey | en |
dc.identifier.rssinternalid | 93648 | en |
dc.identifier.doi | http://dx.doi.org/10.1103/PhysRevB.85.224411 | en |
dc.rights.ecaccessrights | OpenAccess | |
dc.contributor.sponsor | Science Foundation Ireland (SFI) | en |
dc.contributor.sponsorGrantNumber | 9/RFP/PHY2379 | en |
dc.contributor.sponsor | Science Foundation Ireland (SFI) | en |
dc.contributor.sponsorGrantNumber | 10/IN1/I3002 | en |
dc.identifier.uri | http://hdl.handle.net/2262/68504 | |