Local Ferromagnetism in Microporous Carbon with the Structural Regularity of Zeolite Y

Details Local Ferromagnetism in Microporous Carbon with the Structural Regularity of Zeolite Y Local Ferromagnetism in Microporous Carbon with the Structural Regularity of Zeolite Y

2003-09-08

arxiv.org/abs/cond-mat/0309201v1

Physics

Condensed Matter

Strongly Correlated Electrons

To be published in Physical Review B (2003)

Scientific paper

10.1103/PhysRevB.68.092408

Magnetization M(H,T) measurements have been performed on microporous carbon (MC) with a three-dimensional nano-array structure corresponding to that of a zeolite Y supercage. The obtained results unambiguously demonstrate the occurrence of high-temperature ferromagnetism in MC, probably originating from a topological disorder associated with curved graphene sheets. The results provide evidence that the ferromagnetic behavior of MC is governed by isolated clusters in a broad temperature range, and suggest the occurrence of percolative-type transition with the temperature lowering. A comparative analysis of the results obtained on MC and related materials is given.

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