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Graphene oxide and its derivatives as potential Ovchinnikov ferromagnets
A. Sinha, P. Ranjan, A. Ali, , A.D. Thakur
Published in IOP Publishing Ltd
PMID: 34157699
Volume: 33
Issue: 37
Ovchinnikov postulated the possibility of ferromagnetism in organic compounds having a mixed density of sp 3 and sp 2 carbon atoms. Such systems provide an interesting avenue for exploring magnetism in the absence of the quintessential d- and f-block elements as ingredients. As graphene oxide (GO) and its derivatives naturally possess a mixture of sp 3 and sp 2 carbon atoms, it is pertinent to look at them as potential candidates for Ovchinnikov ferromagnetism. We have looked at the evolution of magnetic property in a series of GO samples with a gradual increase in the degree of oxidation and hence the sp 3/sp 2 fraction. Starting with a GO sample with a high sp 3/sp 2 ratio, we utilize chemical reduction technique to prepare another set of reduced graphene oxide (rGO) samples. Magnetization measurements on these samples further illustrate the importance of sp 3/sp 2 fraction on magnetic behavior suggesting GO and its derivatives as a potential Ovchinnikov ferromagnet candidate. The evolution of magnetic moment with sp 3/sp 2 carbons can be utilized in carbon based spintronic applications. © 2021 IOP Publishing Ltd.
About the journal
JournalData powered by TypesetJournal of Physics Condensed Matter
PublisherData powered by TypesetIOP Publishing Ltd