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dc.contributor.authorShi, Xiaohui
dc.contributor.authorJiang, Jiawei
dc.contributor.authorWang, Yadong
dc.contributor.authorHou, Zhipeng
dc.contributor.authorZhang, Qiang
dc.contributor.authorMi, Wenbo
dc.contributor.authorZhang, Xixiang
dc.date.accessioned2021-05-30T13:55:37Z
dc.date.available2021-05-30T13:55:37Z
dc.date.issued2021-05-27
dc.date.submitted2021-04-17
dc.identifier.citationShi, X., Jiang, J., Wang, Y., Hou, Z., Zhang, Q., Mi, W., & Zhang, X. (2021). Emergence of Room Temperature Magnetotransport Anomaly in Epitaxial Pt/γ′-Fe4N/MgO Heterostructures toward Noncollinear Spintronics. ACS Applied Materials & Interfaces. doi:10.1021/acsami.1c07098
dc.identifier.issn1944-8244
dc.identifier.issn1944-8252
dc.identifier.pmid34042440
dc.identifier.doi10.1021/acsami.1c07098
dc.identifier.urihttp://hdl.handle.net/10754/669296
dc.description.abstractNoncollinear spin textures have attracted much attention due to their novel physical behaviors in heavy/ferromagnetic metal (HM/FM) systems. The transport anomaly, appearing as contrast humps in Hall resistivity curves, is the mark of noncollinear spin textures. Here, the epitaxial Pt/γ'-Fe<sub>4</sub>N bilayers with noncollinear spin textures were obtained by facing target sputtering. Large micromagnetic Dzyaloshinskii-Moriya interaction coefficient <i>D</i> of 2.90 mJ/m<sup>2</sup> appears in Pt/γ'-Fe<sub>4</sub>N/MgO systems, which is larger than 2.05 mJ/m<sup>2</sup> of Pt/Co/MgO systems with skyrmionic states. Moreover, at 300 K, magnetic bubble-like domains appear in Pt/γ'-Fe<sub>4</sub>N bilayers that just possess a 3 nm thick ferromagnetic layer instead of [HM/FM]<i><sub>n</sub></i> or [HM<sub>1</sub>/FM/HM<sub>2</sub>]<i><sub>n</sub></i> multilayers. Additionally, a room-temperature transport anomaly appears in Pt/γ'-Fe<sub>4</sub>N/MgO systems. The contrast humps of Pt(3 nm)/γ'-Fe<sub>4</sub>N(<i>t</i><sub>Fe<sub>4</sub>N</sub> ≤ 4 nm)/MgO heterostructures are not sharp due to the nonuniform distributions of the magnetic bubble-like domains with various sizes and irregular shapes, as observed by the magnetic force microscopy. The discovery of epitaxial Pt/γ'-Fe<sub>4</sub>N bilayers with noncollinear spin states is more crucial than that of polycrystalline or amorphous HM/FM systems for reducing ohmic heating, which provides a candidate for noncollinear spintronic applications.
dc.description.sponsorshipThis work is supported by the National Natural Science Foundation of China (nos. 51871161 and 52071233).
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acsami.1c07098
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsami.1c07098.
dc.titleEmergence of Room Temperature Magnetotransport Anomaly in Epitaxial Pt/γ′-Fe4N/MgO Heterostructures toward Noncollinear Spintronics
dc.typeArticle
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentNanofabrication Core Lab
dc.contributor.departmentThin Films & Characterization
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentMaterial Science and Engineering Program
dc.identifier.journalACS Applied Materials & Interfaces
dc.rights.embargodate2022-05-27
dc.eprint.versionPost-print
dc.contributor.institutionTianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology, School of Science, Tianjin University, Tianjin 300354, China
dc.contributor.institutionGuangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute for Advanced Materials, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
dc.contributor.institutionCore Technology Platforms, New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi 129188, United Arab Emirates
kaust.personZhang, Qiang
kaust.personZhang, Xixiang
dc.date.accepted2021-05-24
refterms.dateFOA2021-05-31T08:24:00Z


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