Ferromagnetism in Oriented Graphite Samples

P. Esquinazi; A. Setzer; R. Hoehne; C. Semmelhack; Y. Kopelevich; D. Spemann; T. Butz; B. Kohlstrunk; M. Loesche

doi:10.1103/PhysRevB.66.024429

Ferromagnetism in Oriented Graphite Samples

Strongly Correlated Electrons 2009-11-07 v1 Materials Science

Authors: P. Esquinazi , A. Setzer , R. Hoehne , C. Semmelhack , Y. Kopelevich , D. Spemann , T. Butz , B. Kohlstrunk , M. Loesche

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Abstract

We have studied the magnetization of various, well characterized samples of highly oriented pyrolitic graphite (HOPG), Kish graphite and natural graphite to investigate the recently reported ferromagnetic-like signal and its possible relation to ferromagnetic impurities. The magnetization results obtained for HOPG samples for applied fields parallel to the graphene layers - to minimize the diamagnetic background - show no correlation with the magnetic impurity concentration. Our overall results suggest an intrinsic origin for the ferromagnetism found in graphite. We discuss possible origins of the ferromagnetic signal.

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@article{arxiv.cond-mat/0203153,
  title  = {Ferromagnetism in Oriented Graphite Samples},
  author = {P. Esquinazi and A. Setzer and R. Hoehne and C. Semmelhack and Y. Kopelevich and D. Spemann and T. Butz and B. Kohlstrunk and M. Loesche},
  journal= {arXiv preprint arXiv:cond-mat/0203153},
  year   = {2009}
}

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Ferromagnetism in Oriented Graphite Samples

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