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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Kopelevich, Y., Esquinazi, P., Torres, J.H.S. et al. Ferromagnetic- and Superconducting-Like Behavior of Graphite. Journal of Low Temperature Physics 119, 691–702 (2000). https://doi.org/10.1023/A:1004637814008
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DOI: https://doi.org/10.1023/A:1004637814008