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Magnetic properties of nickel nanowires : effect of deposition temperature

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dc.contributor.author Razee, Kafil M
dc.contributor.author Rhen, Fernando M.F.
dc.contributor.author Roy, Saibal
dc.date.accessioned 2010-09-06T16:18:09Z
dc.date.available 2010-09-06T16:18:09Z
dc.date.issued 2009
dc.identifier.uri http://hdl.handle.net/10344/535
dc.description peer-reviewed en_US
dc.description.abstract We have investigated the magnetic properties of electroplated nickel nanowires with very distinct nanostructures, which are obtained by simply changing the plating temperature of the electrolyte. Low temperature (40°C) resulted in larger average grain size comparable to the diameter of the wires, whereas higher temperature (60°C) revealed self-similar morphology composed of nanogranules. For low temperature samples, a two stage magnetization process is evident in the easy axis direction where grain size is comparable to wire diameter. In contrast, for high temperature samples, nanowires are formed by an agglomeration of particles with average diameter of about 22 nm. In this case each individual particle behaves as a single domain and thereby magnetization reversal occurs by the switching of an ensemble of randomly oriented particles and magnetization saturates quickly with applied field. In the present case, with the high density of disorder caused by the self-similar morphology of the nanogranules, we suggest that the switching mechanism of the magnetization occurs by localized coherent rotation, resulting in lower coercivity. This delineates first experimental evidence of three dimensional cooperative magnetic interactions among the nanogranules within self-similar morphology of nanowires in both parallel and perpendicular wire axes. en_US
dc.language.iso eng en_US
dc.publisher American Institute of Physics en_US
dc.relation.ispartofseries Journal of Applied Physics;105/ 083922
dc.relation.uri http://dx.doi.org/10.1063/1.3109080
dc.subject magnetic properties en_US
dc.title Magnetic properties of nickel nanowires : effect of deposition temperature en_US
dc.type Journal Article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.type.restriction none en
dc.contributor.sponsor SFI
dc.contributor.sponsor EI
dc.relation.projectid 06/IN.1/I98
dc.relation.projectid ILRP/05/PEIG/7

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