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Ferromagnetic- and Superconducting-Like Behavior of Graphite |
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| Authors: | Y Kopelevich P Esquinazi J H S Torres and S Moehlecke |
| Affiliation: | (1) Department of Superconductivity and Magnetism, Institut für Experimentelle Physik II, Universität Leipzig, Linnéstr. 5, D-04103 Leipzig, Germany;(2) Instituto de Física  Gleb Wataghin, , Universidade Estadual de Campinas, Unicamp, 13083-970 Campinas, São Paulo, Brasil |
| Abstract: | We have identified ferromagnetic- and superconducting-like magnetization hysteresis loops in highly oriented pyrolytic graphite samples below and above room temperature. We also found that both behaviors are very sensitive to low-temperature—as compared to the sample synthesis temperature—heat treatment. The possible contribution of magnetic impurities and why these do not appear to be the reason for the observed phenomena is discussed. |
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