Ferromagnetic- and Superconducting-like Behavior of Graphite

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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.
12 pages, 8 figures. Submitted to J. Low Temp. Phys. (Rapid Commun.) the 26.11.99.- First replacement: name in \ack corrected

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Strongly Correlated Electrons, Superconductivity

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https://dspace.dare.co.zw/handle/123456789/102415

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