Tunable room-temperature ferromagnet using an iron-oxide and graphene oxide nanocomposite

Handle URI:
http://hdl.handle.net/10754/566184
Title:
Tunable room-temperature ferromagnet using an iron-oxide and graphene oxide nanocomposite
Authors:
Lin, Aigu L.; Rodrigues, J. N B; Su, Chenliang; Milletari, M.; Loh, Kian Ping; Wu, Tao ( 0000-0003-0845-4827 ) ; Chen, Wei; Neto, A. H Castro; Adam, Shaffique; Wee, Andrew T S
Abstract:
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.
KAUST Department:
Chemical Science Program; Materials Science and Engineering Program; Physical Sciences and Engineering (PSE) Division; Solar and Photovoltaic Engineering Research Center (SPERC); Laboratory of Nano Oxides for Sustainable Energy
Publisher:
Nature Publishing Group
Journal:
Scientific Reports
Issue Date:
23-Jun-2015
DOI:
10.1038/srep11430
Type:
Article
ISSN:
20452322
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; Materials Science and Engineering Program; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorLin, Aigu L.en
dc.contributor.authorRodrigues, J. N Ben
dc.contributor.authorSu, Chenliangen
dc.contributor.authorMilletari, M.en
dc.contributor.authorLoh, Kian Pingen
dc.contributor.authorWu, Taoen
dc.contributor.authorChen, Weien
dc.contributor.authorNeto, A. H Castroen
dc.contributor.authorAdam, Shaffiqueen
dc.contributor.authorWee, Andrew T Sen
dc.date.accessioned2015-08-12T09:31:33Zen
dc.date.available2015-08-12T09:31:33Zen
dc.date.issued2015-06-23en
dc.identifier.issn20452322en
dc.identifier.doi10.1038/srep11430en
dc.identifier.urihttp://hdl.handle.net/10754/566184en
dc.description.abstractMagnetic 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.en
dc.publisherNature Publishing Groupen
dc.titleTunable room-temperature ferromagnet using an iron-oxide and graphene oxide nanocompositeen
dc.typeArticleen
dc.contributor.departmentChemical Science Programen
dc.contributor.departmentMaterials Science and Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.contributor.departmentLaboratory of Nano Oxides for Sustainable Energyen
dc.identifier.journalScientific Reportsen
kaust.authorWu, Taoen
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