Temperature oscillations of magnetization observed in nanofluid ferromagnetic graphite

S. Sergeenkov, N. S. Souza, C. Speglich, V. A.G. Rivera, C. A. Cardoso, H. Pardo, A. W. Mombrú, F. M. Araújo-Moreira

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Abstract

We report on unusual magnetic properties observed for nanofluid room temperature ferromagnetic graphite (with an average particle size of l≃10nm). More precisely, the measured magnetization exhibits a low temperature anomaly (attributed to the manifestation of finite size effects below the quantum temperature T1∝h2/l2) as well as pronounced temperature oscillations above T = 50K (attributed to manifestation of the hard-sphere type of pair correlations between ferromagnetic particles in the nanofluid).

Original languageEnglish
Article number495303
JournalJournal of Physics Condensed Matter
Volume21
Issue number49
DOIs
StatePublished - 2009
Externally publishedYes

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