Edge ferromagnetism of graphene oxide
Source abstract
Abstract
Using SQUID magnetometry and ferromagnetic resonance we show that the intrinsic ferromagnetism in graphene oxide (GO) is related to the zigzag edges created by breaking GO layers in the process of exfoliation. The 1D magnetic order existing below 2 K is destroyed by spin fluctuations enhanced by spin-flip transitions of the magnetic moments of protons from hydroxyl groups. Dipole-dipole interactions between short ordered segments at zigzag edges result in superferromagnetism below 65 – 75 K and superparamagnetism at higher temperatures. The strong ferromagnetism is observed for GO flakes in vacuum while the weak residual ferromagnetism of GO paper is due to magnetic moments surviving in the closed pores.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Graphene research and applications · Advancements in Battery Materials · Diamond and Carbon-based Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
Show source-provided references
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