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Effects of the radio-frequency sputtering power of an MgO tunneling barrier on the tunneling magneto-resistance ratio for Co2Fe6B2/MgO-based perpendicular-magnetic tunnel junctions

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dc.contributor.authorLee, Du-Yeong-
dc.contributor.authorSeo, Hyung-Tak-
dc.contributor.authorPark, Jea-Gun-
dc.date.accessioned2021-08-02T15:55:44Z-
dc.date.available2021-08-02T15:55:44Z-
dc.date.created2021-05-12-
dc.date.issued2016-11-
dc.identifier.issn2050-7526-
dc.identifier.urihttps://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/21405-
dc.description.abstractFor Co2Fe6B2-MgO based p-MTJ spin valves with [Co/Pt](n)-SyAF layers ex situ annealed at 350 degrees C and 30 kOe for 30 min, the tunneling magneto-resistance (TMR) ratio strongly depended on the radio-frequency (RF) sputtering power in a 0.65-1.15 nm thick MgO tunneling barrier, achieving a TMR ratio of 168% at 300 W. The TMR ratio rapidly and linearly increased with a decrease in the RF sputtering power between 300 and 500 W and then abruptly decreased at 250 W since the face-centered-cubic crystallinity of the tunneling barrier improved with a decrease in the RF sputtering power between 300 and 500 W and then abruptly degraded at 250 W. Optical properties measured by spectroscopic ellipsometry, such as the defect state density and energy band gap of a similar to 1.0 nm thick tunneling barrier layer, indicate that the RF sputtering power needed to obtain a larger poly grain size for the barrier tends to enhance the barrier's face-centered-cubic crystallinity.-
dc.language영어-
dc.language.isoen-
dc.publisherROYAL SOC CHEMISTRY-
dc.titleEffects of the radio-frequency sputtering power of an MgO tunneling barrier on the tunneling magneto-resistance ratio for Co2Fe6B2/MgO-based perpendicular-magnetic tunnel junctions-
dc.typeArticle-
dc.contributor.affiliatedAuthorPark, Jea-Gun-
dc.identifier.doi10.1039/c5tc03669k-
dc.identifier.scopusid2-s2.0-84951161516-
dc.identifier.wosid000366912500016-
dc.identifier.bibliographicCitationJOURNAL OF MATERIALS CHEMISTRY C, v.4, no.1, pp.135 - 141-
dc.relation.isPartOfJOURNAL OF MATERIALS CHEMISTRY C-
dc.citation.titleJOURNAL OF MATERIALS CHEMISTRY C-
dc.citation.volume4-
dc.citation.number1-
dc.citation.startPage135-
dc.citation.endPage141-
dc.type.rimsART-
dc.type.docTypeArticle-
dc.description.journalClass1-
dc.description.isOpenAccessN-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.relation.journalResearchAreaMaterials Science-
dc.relation.journalResearchAreaPhysics-
dc.relation.journalWebOfScienceCategoryMaterials Science, Multidisciplinary-
dc.relation.journalWebOfScienceCategoryPhysics, Applied-
dc.subject.keywordPlusCOFEB THIN-FILMS-
dc.subject.keywordPlusMAGNESIUM-
dc.subject.keywordPlusANISOTROPY-
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