Superconductivity in the non-magnetic state of iron under pressure

Katsuya Shimizu (), Tomohiro Kimura, Shigeyuki Furomoto, Keiki Takeda, Kazuyoshi Kontani, Yoshichika Onuki and Kiichi Amaya
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Katsuya Shimizu: Graduate School of Engineering Science, 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

Nature, 2001, vol. 412, issue 6844, 316-318

Abstract: 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.

Date: 2001
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DOI: 10.1038/35085536

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