Pressure-temperature phase diagram and superconductivity in UIr

Tatsuo C. Kobayashi, Akihiro Hori, Satoshi Fukushima, Hiroyuki Hidaka, Hisashi Kotegawa, Teruhiko Akazawa, Keiki Takeda, Yasuo Ohishi, Etsuji Yamamoto

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31 Citations (Scopus)


Pressure-induced superconductivity is found in UIr without inversion symmetry. The pressure-temperature phase diagram has been investigated by means of the electrical resistivity, ac-susceptibility and magnetization measurements under high pressure. The phase diagram consists of three magnetic phases FM1-3 and a superconducting phase. The huge enhancement of residual resistivity and the negative magnetoresistance are found in the intermediate pressure region. These behavior may be induced by the pressure-induced structural phase transition and the accompanied phase separation in this pressure range. The superconducting phase with narrow pressure range is embedded in the FM3 phase, adjacent to zero-temperature FM3-to-nonmagnetic transition. The temperature dependence of resistivity above T SC follows non-Fermi liquid form of T 1.6. From these experimental facts, superconductivity is considered to be associated with the ferromagnetic fluctuation.

Original languageEnglish
Article number051007
Journaljournal of the physical society of japan
Issue number5
Publication statusPublished - May 2007


  • Critical fluctuation
  • Ferromagnetism
  • Inversion symmetry
  • Superconductivity
  • UIr

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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