dc.contributor.author | COEY, JOHN | en |
dc.date.accessioned | 2017-01-16T12:45:30Z | |
dc.date.available | 2017-01-16T12:45:30Z | |
dc.date.issued | 2016 | en |
dc.date.submitted | 2016 | en |
dc.identifier.citation | Liu L, Niu J, Guo H, Wei J, Li D.L, Feng J.F, Han X.F, Coey J.M.D, Zhang X.-G, Spin-flip noise due to nonequilibrium spin accumulation, Physical Review B - Condensed Matter and Materials Physics, 93, 18, 2016, 180401- | en |
dc.identifier.other | Y | en |
dc.description | PUBLISHED | en |
dc.description | Export Date: 13 January 2017 | en |
dc.description.abstract | When current flows through a magnetic tunnel junction (MTJ), there is spin accumulation at the electrode-barrier interfaces if the magnetic moments of the two ferromagnetic electrodes are not aligned. Here we report that such nonequilibrium spin accumulation generates its own characteristic low frequency noise (LFN). Past work viewed the LFN in MTJs as an equilibrium effect arising from resistance fluctuations (SR) which a passively applied current (I) converts to measurable voltage fluctuations (SV=I2SR). We treat the LFN associated with spin accumulation as a nonequilibrium effect, and find that the noise power can be fitted in terms of the spin-polarized current by SIf=aIcoth(Ib)−ab, resembling the form of the shot noise for a tunnel junction, but with current now taking the role of the bias voltage, and spin-flip probability taking the role of tunneling probability. | en |
dc.description.sponsorship | Work at Peking University was supported by National Basic
Research Program of China (973 Program) through Grants
No. 2011CBA00106 and No. 2012CB927400, as well as
National Natural Science Foundation of China (NSFC, Grant
No. 11474008). Work at IOP, CAS was supported by the 863
Plan Project of Ministry of Science and Technology (MOST,
No. 2014AA032904), and NSFC, Grants No. 11434014,
No. 51229101, and No. 51401236. Work at Trinity College
Dublin was supported by SFI Contract No. 10/IN1.13006.
X.G.Z. acknowledges support in part by NSF Grant No | en |
dc.format.extent | 180401 | en |
dc.relation.ispartofseries | Physical Review B - Condensed Matter and Materials Physics | en |
dc.relation.ispartofseries | 93 | en |
dc.relation.ispartofseries | 18 | en |
dc.rights | Y | en |
dc.subject | magnetic tunnel junction (MTJ) | en |
dc.subject.lcsh | magnetic tunnel junction (MTJ) | en |
dc.title | Spin-flip noise due to nonequilibrium spin accumulation | 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 | 142892 | en |
dc.identifier.doi | http://dx.doi.org/10.1103/PhysRevB.93.180401 | en |
dc.rights.ecaccessrights | openAccess | |
dc.identifier.rssuri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84966393577&doi=10.1103%2fPhysRevB.93.180401&partnerID=40&md5=9e8019ab339ce1b394fd0ba9c460de9c | en |
dc.identifier.orcid_id | 0000-0003-0053-8452 | en |
dc.contributor.sponsor | Science Foundation Ireland (SFI) | en |
dc.contributor.sponsorGrantNumber | 10/IN1.13006 | en |
dc.identifier.uri | http://hdl.handle.net/2262/78754 | |