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 language | English |
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Article number | 051007 |
Journal | journal of the physical society of japan |
Volume | 76 |
Issue number | 5 |
DOIs | |
Publication status | Published - May 2007 |
Keywords
- Critical fluctuation
- Ferromagnetism
- Inversion symmetry
- Superconductivity
- UIr
ASJC Scopus subject areas
- Physics and Astronomy(all)