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

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

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
Volume76
Issue number5
DOIs
Publication statusPublished - May 2007

Keywords

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

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Kobayashi, T. C., Hori, A., Fukushima, S., Hidaka, H., Kotegawa, H., Akazawa, T., Takeda, K., Ohishi, Y., & Yamamoto, E. (2007). Pressure-temperature phase diagram and superconductivity in UIr. journal of the physical society of japan, 76(5), [051007]. https://doi.org/10.1143/JPSJ.76.051007