Tunable room-temperature ferromagnet using an iron-oxide and graphene oxide nanocomposite
Type
ArticleAuthors
Lin, Aigu L.Rodrigues, J. N B
Su, Chenliang
Milletari, M.
Loh, Kian Ping
Wu, Tao

Chen, Wei
Neto, A. H Castro
Adam, Shaffique
Wee, Andrew T. S.

KAUST Department
Chemical Science ProgramKAUST Solar Center (KSC)
Laboratory of Nano Oxides for Sustainable Energy
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2015-06-23Online Publication Date
2015-06-23Print Publication Date
2015-09Permanent link to this record
http://hdl.handle.net/10754/566184
Metadata
Show full item recordAbstract
Magnetic materials have found wide application ranging from electronics and memories to medicine. Essential to these advances is the control of the magnetic order. To date, most room-temperature applications have a fixed magnetic moment whose orientation is manipulated for functionality. Here we demonstrate an iron-oxide and graphene oxide nanocomposite based device that acts as a tunable ferromagnet at room temperature. Not only can we tune its transition temperature in a wide range of temperatures around room temperature, but the magnetization can also be tuned from zero to 0.011 A m2/kg through an initialization process with two readily accessible knobs (magnetic field and electric current), after which the system retains its magnetic properties semi-permanently until the next initialization process. We construct a theoretical model to illustrate that this tunability originates from an indirect exchange interaction mediated by spin-imbalanced electrons inside the nanocomposite. © 2015 Scientific Reports.Citation
Lin, A. L., Rodrigues, J. N. B., Su, C., Milletari, M., Loh, K. P., Wu, T., … Wee, A. T. S. (2015). Tunable room-temperature ferromagnet using an iron-oxide and graphene oxide nanocomposite. Scientific Reports, 5(1). doi:10.1038/srep11430Publisher
Springer NatureJournal
Scientific ReportsPubMed ID
26100970arXiv
1503.00960Additional Links
https://www.nature.com/articles/srep11430.pdfae974a485f413a2113503eed53cd6c53
10.1038/srep11430
Scopus Count
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