Oxygen adsorption effect on magnetic properties of graphite
D. W. Boukhvalov, S. Moehlecke, R. R. da Silva, Y. Kopelevich
TL;DR
This study investigates how oxygen adsorption influences the magnetic properties of graphite, revealing that edge oxidation can induce ferromagnetism by altering magnetic interactions.
Contribution
It provides new insights into the role of edge oxidation in tuning the magnetic behavior of graphite, combining experimental and theoretical approaches.
Findings
Edge oxidation transforms antiferromagnetic interactions to ferromagnetic.
Partial oxidation of graphite edges induces stable ferromagnetism.
Theoretical models support experimental observations.
Abstract
Both experimental and theoretical studies of the magnetic properties of micrographite and nanographite indicate a crucial role of the partial oxidation of graphitic zigzag edges in ferromagnetism. In contrast to total and partial hydrogenation, the oxidation of half of the carbon atoms on the graphite edges transforms the antiferromagnetic exchange interaction between graphite planes and over graphite ribbons to the ferromagnetic interaction. The stability of the ferromagnetism is discussed.
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