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dc.contributor.authorZhang, Yiou
dc.contributor.authorHe, Guanyang
dc.contributor.authorZhang, Xixiang
dc.contributor.authorXiao, Gang
dc.date.accessioned2019-07-28T13:58:14Z
dc.date.available2019-07-28T13:58:14Z
dc.date.issued2019-07-08
dc.identifier.citationZhang, Y., He, G., Zhang, X., & Xiao, G. (2019). Magnetotransport and electronic noise in superparamagnetic magnetic tunnel junctions. Applied Physics Letters, 115(2), 022402. doi:10.1063/1.5110715
dc.identifier.doi10.1063/1.5110715
dc.identifier.urihttp://hdl.handle.net/10754/656209
dc.description.abstractWe have investigated the magnetotransport and noise properties of magnetic tunnel junctions incorporating a superparamagnetic free layer, in a wide temperature range from 150 K to 400 K. Both 1/f noise and sensitivity reach the maximum near the blocking temperature of the superparamagnetic transition. The smooth change of noise around the blocking temperature is attributed to size distribution of nanoclusters comprising the free layer. The best detectability (40 nT / H z at 1 Hz) is achieved at 350 K. In ferromagnetic and superparamagnetic states, 1/f noise follows different scaling relations with respect to sensitivity. The change of scaling law is explained by thermodynamics of the nanoclusters.
dc.description.sponsorshipThis work was supported by the King Abdullah University of Science and Technology (KAUST) through the Sensor Initiative.
dc.publisherAIP Publishing
dc.relation.urlhttp://aip.scitation.org/doi/10.1063/1.5110715
dc.rightsThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Applied Physics Letters and may be found at http://doi.org/10.1063/1.5110715.
dc.titleMagnetotransport and electronic noise in superparamagnetic magnetic tunnel junctions
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalApplied Physics Letters
dc.rights.embargodate2020-07-08
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionDepartment of Physics, Brown University, Providence, Rhode Island 02912, USA
kaust.personZhang, Xixiang


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