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Title

Magnetoresistance controls of arborous bead-dendritic growth of magnetic electrodeposits

AuthorsNikolic, N. D.; Wang, Hai; Cheng, Hao; Guerrero, C.; Ponizovskaya, E. V.; Pan, Genhua; García García, Nicolás
KeywordsNickel
Magnetic thin films
Metallic thin films
Electrodeposition
Magnetoresistance
Dendritic structure
Issue Date11-Aug-2004
PublisherElectrochemical Society
CitationJournal of the electrochemical society 151(9): C577-C584 (2004)
AbstractThe effect of magnetic fields applied on magnetic metals electrodeposition was examined. Nickel deposits obtained from a Watt solution with coumarin, at cathodic potentials of –1000, –1200, and –1300 mV/SCE, without and with, both, perpendicular and parallel oriented to the electrode surface low applied magnetic fields (up to 500 Oe) were examined by scanning electron microscopy (SEM) technique. At a potential of –1300 mV/SCE, a dramatic difference was observed between nickel morphologies obtained with a perpendicular oriented magnetic field (zero MHD effect) and those obtained in the absence of one. The nickel deposit obtained with perpendicular oriented magnetic fields was a very developed 3D arboreous-bead-dendritic structure. On the other hand, the nickel deposit obtained without the presence of magnetic field was very rough, with a clearly visible clustered structure. The obtained nickel morphologies are then compared with copper morphologies. Based on the fact that copper deposits obtained with and without a perpendicular oriented magnetic field were dendritic structures, the observed difference between nickel deposits with and those without a perpendicular oriented field, is essentially ascribed to the magnetoresistance effect on the magnetic deposits, which are nonexistent in nonmagnetic materials. We also have done experiments with iron deposits.
Description8 pages.-- PACS: 73.50.Jt; 68.55.Ac; 68.55.Jk; 68.35.Bs; 81.15.Pq
Publisher version (URL)http://dx.doi.org/10.1149/1.1776591
URIhttp://hdl.handle.net/10261/21750
DOI10.1149/1.1776591
ISSN0013-4651
Appears in Collections:(LFSPyN) Artículos
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