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dc.contributor.authorCOEY, JOHNen
dc.contributor.authorFENG, JIA-FENGen
dc.contributor.authorDIAO, ZHUen
dc.date.accessioned2010-07-14T09:59:58Z
dc.date.available2010-07-14T09:59:58Z
dc.date.issued2010en
dc.date.submitted2010en
dc.identifier.citationFeng, J.F., Diao, Z., Feng, G., Nowak, E.R., Coey, J.M.D. , Magnetic noise in MgO-based magnetic tunnel junction rings , Applied Physics Letters, 96, 5, 2010, art. no. 052504en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/40309
dc.descriptionPUBLISHEDen
dc.description.abstractMagnetization switching is investigated in ring-shaped MgO-based magnetic tunnel junctions with 168% tunneling magnetoresistance. Besides the forward and reverse onion states, two vortex states and several metastable states are observed for the ferromagnetic free layer. Electrical noise is used to characterize the low frequency magnetization dynamics; a stationary 1/ f noise spectrum is observed within each magnetic state but they are separated by noise peaks which show a 1/ f2 spectrum that is associated with slow random telegraph fluctuations. In the 1/ f region, the normalized magnetic noise parameter, mag, is shown to be consistent with the fluctuation-dissipation theorem.en
dc.description.sponsorshipThis work was supported by Science Foundation Ireland as part of the MANSE project, and the Ireland-China exchange agreement. Some support was also provided by Enterprise Ireland, as part of the ?Spincurrents? FoNE network. E.R.N. also acknowledges partial support by DOE under Award No. DE-FG02-07ER46374.en
dc.format.extentart. no. 052504en
dc.language.isoenen
dc.relation.ispartofseriesApplied Physics Lettersen
dc.relation.ispartofseries96en
dc.relation.ispartofseries5en
dc.rightsYen
dc.subjectAtomic, molecular and chemical physicsen
dc.subjectMagnetization switchingen
dc.titleMagnetic noise in MgO-based magnetic tunnel junction ringsen
dc.typeJournal Articleen
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/jcoeyen
dc.identifier.rssinternalid65897en
dc.identifier.doihttp://dx.doi.org/10.1063/1.3295707en
dc.subject.TCDThemeNanoscience & Materialsen


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