dc.contributor.author | COEY, JOHN | en |
dc.contributor.author | FENG, JIA-FENG | en |
dc.contributor.author | DIAO, ZHU | en |
dc.date.accessioned | 2010-07-14T09:59:58Z | |
dc.date.available | 2010-07-14T09:59:58Z | |
dc.date.issued | 2010 | en |
dc.date.submitted | 2010 | en |
dc.identifier.citation | Feng, 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. 052504 | en |
dc.identifier.other | Y | en |
dc.identifier.uri | http://hdl.handle.net/2262/40309 | |
dc.description | PUBLISHED | en |
dc.description.abstract | Magnetization 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.sponsorship | This 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.extent | art. no. 052504 | en |
dc.language.iso | en | en |
dc.relation.ispartofseries | Applied Physics Letters | en |
dc.relation.ispartofseries | 96 | en |
dc.relation.ispartofseries | 5 | en |
dc.rights | Y | en |
dc.subject | Atomic, molecular and chemical physics | en |
dc.subject | Magnetization switching | en |
dc.title | Magnetic noise in MgO-based magnetic tunnel junction rings | en |
dc.type | Journal Article | en |
dc.contributor.sponsor | Science Foundation Ireland (SFI) | 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 | 65897 | en |
dc.identifier.doi | http://dx.doi.org/10.1063/1.3295707 | en |
dc.subject.TCDTheme | Nanoscience & Materials | en |