Tailoring perpendicular magnetic anisotropy with graphene oxide membranes

Handle URI:
http://hdl.handle.net/10754/626244
Title:
Tailoring perpendicular magnetic anisotropy with graphene oxide membranes
Authors:
Ning, Keyu; Liu, Houfang; Li, Linsen; Li, Huanglong; Feng, Jiafeng; Yang, Baishun; Liu, Xiao; Li, Yuxing; Chen, Yanhui; Wei, Hongxiang; Han, Xiufeng; Mao, Shengcheng; Zhang, Xixiang ( 0000-0002-3478-6414 ) ; Yang, Yi; Ren, Tian-ling ( 0000-0002-3941-8936 )
Abstract:
Graphene oxide (GO) membranes have been widely explored for their excellent physical and chemical properties, and abundant functional groups. In this work, we report the improvement of the perpendicular magnetic anisotropy (PMA) of CoFeB thin films by applying a coating of GO membranes. We observe that the PMA of the CoFeB/MgAl–O stacks is strongly enhanced by the coating of GO membranes and even reaches 0.6 mJ m−2 at room temperature after an annealing process. The critical thickness of the membrane-coated CoFeB for switching the magnetization from the out-of-plane to the in-plane axis exceeds 1.6 nm. First-principle calculations are performed to investigate the contribution of the GO membranes to the magnetic anisotropy energy (MAE). Due to changes in the hybridization of 3d orbitals, varying the location of the C atomic layer with Co changes the contribution of the Co–C stacks to PMA. Thus, the large PMA achieved with GO membranes can be attributed to the orbital hybridization of the C and O atoms with the Co orbitals. These results provide a comprehensive understanding of the PMA and point towards opportunities to achieve multifunctional graphene-composite spintronic devices.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Ning K, Liu H, Li L, Li H, Feng J, et al. (2017) Tailoring perpendicular magnetic anisotropy with graphene oxide membranes. RSC Advances 7: 52938–52944. Available: http://dx.doi.org/10.1039/c7ra08644j.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
RSC Advances
Issue Date:
15-Nov-2017
DOI:
10.1039/c7ra08644j
Type:
Article
ISSN:
2046-2069
Sponsors:
This work was supported by National Natural Science Foundation(51501098, 61574083, 61434001), National Key R&D Program (2016YFA0200400), National Basic Research Program (2015CB352101), Special Fund for Agroscientific Research in the Public Interest (201303107) of China, Research Fund from Beijing Innovation Center for Future Chip, and Beijing Natural Science Foundation (No. 4164087). The authors are also thankful for the support of the Independent Research Program (2014Z01006) of Tsinghua University, in part by funding from King Abdullah University of Science and Technology (KAUST). J. F. acknowledges Youth Innovation Promotion Association of Chinese Academy of Sciences (No. 2017010). We would like to thank Dr Caihua Wan for discussions.
Additional Links:
http://pubs.rsc.org/en/Content/ArticleLanding/2017/RA/C7RA08644J#!divAbstract
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorNing, Keyuen
dc.contributor.authorLiu, Houfangen
dc.contributor.authorLi, Linsenen
dc.contributor.authorLi, Huanglongen
dc.contributor.authorFeng, Jiafengen
dc.contributor.authorYang, Baishunen
dc.contributor.authorLiu, Xiaoen
dc.contributor.authorLi, Yuxingen
dc.contributor.authorChen, Yanhuien
dc.contributor.authorWei, Hongxiangen
dc.contributor.authorHan, Xiufengen
dc.contributor.authorMao, Shengchengen
dc.contributor.authorZhang, Xixiangen
dc.contributor.authorYang, Yien
dc.contributor.authorRen, Tian-lingen
dc.date.accessioned2017-11-29T11:13:56Z-
dc.date.available2017-11-29T11:13:56Z-
dc.date.issued2017-11-15en
dc.identifier.citationNing K, Liu H, Li L, Li H, Feng J, et al. (2017) Tailoring perpendicular magnetic anisotropy with graphene oxide membranes. RSC Advances 7: 52938–52944. Available: http://dx.doi.org/10.1039/c7ra08644j.en
dc.identifier.issn2046-2069en
dc.identifier.doi10.1039/c7ra08644jen
dc.identifier.urihttp://hdl.handle.net/10754/626244-
dc.description.abstractGraphene oxide (GO) membranes have been widely explored for their excellent physical and chemical properties, and abundant functional groups. In this work, we report the improvement of the perpendicular magnetic anisotropy (PMA) of CoFeB thin films by applying a coating of GO membranes. We observe that the PMA of the CoFeB/MgAl–O stacks is strongly enhanced by the coating of GO membranes and even reaches 0.6 mJ m−2 at room temperature after an annealing process. The critical thickness of the membrane-coated CoFeB for switching the magnetization from the out-of-plane to the in-plane axis exceeds 1.6 nm. First-principle calculations are performed to investigate the contribution of the GO membranes to the magnetic anisotropy energy (MAE). Due to changes in the hybridization of 3d orbitals, varying the location of the C atomic layer with Co changes the contribution of the Co–C stacks to PMA. Thus, the large PMA achieved with GO membranes can be attributed to the orbital hybridization of the C and O atoms with the Co orbitals. These results provide a comprehensive understanding of the PMA and point towards opportunities to achieve multifunctional graphene-composite spintronic devices.en
dc.description.sponsorshipThis work was supported by National Natural Science Foundation(51501098, 61574083, 61434001), National Key R&D Program (2016YFA0200400), National Basic Research Program (2015CB352101), Special Fund for Agroscientific Research in the Public Interest (201303107) of China, Research Fund from Beijing Innovation Center for Future Chip, and Beijing Natural Science Foundation (No. 4164087). The authors are also thankful for the support of the Independent Research Program (2014Z01006) of Tsinghua University, in part by funding from King Abdullah University of Science and Technology (KAUST). J. F. acknowledges Youth Innovation Promotion Association of Chinese Academy of Sciences (No. 2017010). We would like to thank Dr Caihua Wan for discussions.en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2017/RA/C7RA08644J#!divAbstracten
dc.rightsThis article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.en
dc.rights.urihttp://creativecommons.org/licenses/by-nc/3.0/en
dc.titleTailoring perpendicular magnetic anisotropy with graphene oxide membranesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalRSC Advancesen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionTsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing 100084, Chinaen
dc.contributor.institutionInstitute of Microelectronics, Tsinghua University, Beijing 100084, Chinaen
dc.contributor.institutionDepartment of Precision Instrument, Tsinghua University, Beijing 100084, Chinaen
dc.contributor.institutionBeijing National Laboratory of Condensed Matter Physics, Institute of Physics, University of Chinese Academy of Science, Chinese Academy of Sciences, Beijing 100190, Chinaen
dc.contributor.institutionInstitute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing, Chinaen
kaust.authorZhang, Xixiangen
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