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Superconductivity in the non-magnetic state of iron under pressure

Author

Listed:
  • Katsuya Shimizu

    (Graduate School of Engineering Science, Osaka University
    Research Center for Materials Science at Extreme Conditions, Osaka University)

  • Tomohiro Kimura

    (Graduate School of Engineering Science, Osaka University)

  • Shigeyuki Furomoto

    (Graduate School of Engineering Science, Osaka University)

  • Keiki Takeda

    (Graduate School of Engineering Science, Osaka University)

  • Kazuyoshi Kontani

    (Graduate School of Engineering Science, Osaka University)

  • Yoshichika Onuki

    (Graduate School of Science, Osaka University)

  • Kiichi Amaya

    (Graduate School of Engineering Science, Osaka University
    Research Center for Materials Science at Extreme Conditions, Osaka University)

Abstract

Ferromagnetism and superconductivity are thought to compete in conventional superconductors, although in principle it is possible for any metal to become a superconductor in its non-magnetic state at a sufficiently low temperature. At pressures above 10 GPa, iron is known to transform to a non-magnetic structure1,2 and the possibility of superconductivity in this state has been predicted3,4. Here we report that iron does indeed become superconducting at temperatures below 2 K at pressures between 15 and 30 GPa. The transition to the superconducting state is confirmed by both a drop in resistivity and observation of the Meissner effect.

Suggested Citation

  • Katsuya Shimizu & Tomohiro Kimura & Shigeyuki Furomoto & Keiki Takeda & Kazuyoshi Kontani & Yoshichika Onuki & Kiichi Amaya, 2001. "Superconductivity in the non-magnetic state of iron under pressure," Nature, Nature, vol. 412(6844), pages 316-318, July.
    • Handle: RePEc:nat:nature:v:412:y:2001:i:6844:d:10.1038_35085536
    DOI: 10.1038/35085536
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