Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/163173
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dc.contributor.authorPoh, Han Yinen_US
dc.contributor.authorAng, Calvin Ching Ianen_US
dc.contributor.authorGan, Weiliangen_US
dc.contributor.authorLim, Gerard Josephen_US
dc.contributor.authorLew, Wen Siangen_US
dc.date.accessioned2022-11-28T05:59:19Z-
dc.date.available2022-11-28T05:59:19Z-
dc.date.issued2021-
dc.identifier.citationPoh, H. Y., Ang, C. C. I., Gan, W., Lim, G. J. & Lew, W. S. (2021). Direct spin accumulation quantification in ferromagnetic heterostructures using DC bias harmonic Hall measurement. Physical Review B, 104, 224416-. https://dx.doi.org/10.1103/PhysRevB.104.224416en_US
dc.identifier.issn1098-0121en_US
dc.identifier.urihttps://hdl.handle.net/10356/163173-
dc.description.abstractA technique for spin accumulation quantification, specifically in the ferromagnetic layer of spin-orbit torque inducing heterostructures has been elusive. Here, we demonstrate an easy-to-implement technique to achieve this quantification by applying an additional DC bias during the harmonic Hall measurement in Si/SiO2/Ta/Co/Pt. The spin accumulation arising from the DC bias generates an amplitude offset detectable in the first harmonic Hall magnetoresistance. By performing the first harmonic Hall magnetoresistance measurement under a fixed DC bias for two oppositely magnetized states, spin accumulation polarity set by the DC bias enhances the magnetoresistance if it aligns with the magnetization, and vice versa. Thus, the difference in the magnetoresistance amplitude provides the quantitative magnitude of spin accumulation relative to the ferromagnet's saturation magnetization, measured to be up to 0.29% in Si/SiO2/Ta/Co/Pt. The strength of both spin accumulation and dampinglike efficiency increased with Ta thickness, further verifying our experimental technique.en_US
dc.description.sponsorshipAgency for Science, Technology and Research (A*STAR)en_US
dc.description.sponsorshipEconomic Development Board (EDB)en_US
dc.language.isoenen_US
dc.relationI1801E0030en_US
dc.relationRCA2019-1376en_US
dc.relation.ispartofPhysical Review Ben_US
dc.rights© 2021 American Physical Society. All rights reserved. This paper was published in Physical Review B and is made available with permission of American Physical Society.en_US
dc.subjectScience::Physicsen_US
dc.titleDirect spin accumulation quantification in ferromagnetic heterostructures using DC bias harmonic Hall measurementen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.identifier.doi10.1103/PhysRevB.104.224416-
dc.description.versionSubmitted/Accepted versionen_US
dc.identifier.volume104en_US
dc.identifier.spage224416en_US
dc.subject.keywordsSpin-Orbit Torqueen_US
dc.subject.keywordsFerromagnetic Materialsen_US
dc.description.acknowledgementThis work was supported by RIE2020 ASTAR AME IAFICP Grant No. I1801E0030 and EDB-IPP (Grant No. RCA2019-1376).en_US
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