Bias-voltage dependence of perpendicular spin-transfer torque in asymmetric MgO-based magnetic tunnel junctions

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dc.contributor.authorOh, Se-Chungko
dc.contributor.authorPark, Seung-Youngko
dc.contributor.authorManchon, Aurelienko
dc.contributor.authorChshiev, Mairbekko
dc.contributor.authorHan, Jae-Hoko
dc.contributor.authorLee, Hyun-Wooko
dc.contributor.authorLee, Jang-Eunko
dc.contributor.authorNam, Kyung-Taeko
dc.contributor.authorJo, Younghunko
dc.contributor.authorKong, Yo-Chanko
dc.contributor.authorDieny, Bernardko
dc.contributor.authorLee, Kyung-Jinko
dc.date.accessioned2020-11-26T08:30:09Z-
dc.date.available2020-11-26T08:30:09Z-
dc.date.created2020-11-18-
dc.date.issued2009-12-
dc.identifier.citationNATURE PHYSICS, v.5, no.12, pp.898 - 902-
dc.identifier.issn1745-2473-
dc.identifier.urihttp://hdl.handle.net/10203/277654-
dc.description.abstractSpin-transfer torque(1,2) (STT) allows the electrical control of magnetic states in nanostructures(3-5). The STT in magnetic tunnel junctions (MTJs) is of particular importance owing to its potential for device applications(6,7). It has been demonstrated(8-11) that the MTJ has a sizable perpendicular STT (tau(perpendicular to), field-like torque), which substantially affects STT-driven magnetization dynamics. In contrast to symmetric MTJs where the bias dependence of tau(perpendicular to) is quadratic(8-10,12,13), it is theoretically predicted that the symmetry breaking of the system causes an extra linear bias dependence(11). Here, we report experimental results that are consistent with the predicted linear bias dependence in asymmetric MTJs. The linear contribution is quite significant and its sign changes from positive to negative as the asymmetry is modified. This result opens a way to design the bias dependence of the field-like term, which is useful for device applications by allowing, in particular, the suppression of the abnormal switching-back phenomena.-
dc.languageEnglish-
dc.publisherNATURE PUBLISHING GROUP-
dc.titleBias-voltage dependence of perpendicular spin-transfer torque in asymmetric MgO-based magnetic tunnel junctions-
dc.typeArticle-
dc.identifier.wosid000273086700018-
dc.identifier.scopusid2-s2.0-71449104963-
dc.type.rimsART-
dc.citation.volume5-
dc.citation.issue12-
dc.citation.beginningpage898-
dc.citation.endingpage902-
dc.citation.publicationnameNATURE PHYSICS-
dc.identifier.doi10.1038/NPHYS1427-
dc.contributor.localauthorLee, Kyung-Jin-
dc.contributor.nonIdAuthorOh, Se-Chung-
dc.contributor.nonIdAuthorPark, Seung-Young-
dc.contributor.nonIdAuthorManchon, Aurelien-
dc.contributor.nonIdAuthorChshiev, Mairbek-
dc.contributor.nonIdAuthorHan, Jae-Ho-
dc.contributor.nonIdAuthorLee, Hyun-Woo-
dc.contributor.nonIdAuthorLee, Jang-Eun-
dc.contributor.nonIdAuthorNam, Kyung-Tae-
dc.contributor.nonIdAuthorJo, Younghun-
dc.contributor.nonIdAuthorKong, Yo-Chan-
dc.contributor.nonIdAuthorDieny, Bernard-
dc.description.isOpenAccessY-
dc.type.journalArticleArticle-
dc.subject.keywordPlusDRIVEN-
dc.subject.keywordPlusEMISSION-
dc.subject.keywordPlusDEVICES-
dc.subject.keywordPlusWAVES-
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