Pressure-induced Superconductivity in UIr(Condensed matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

概要

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Pressure-induced superconductivity is found in Ulr without inversion symmetry. The pressure-temperature phase diagram has been investigated by means of the electrical resistivity and magnetization measurements under high pressure. The phase diagram consists of two magnetic phases, the Ising-like ferromagnetic phase (FM1) at low pressures and another magnetic phase (FM2) with the small ferromagnetic component along the [101^^-] direction at high pressures. Superconductivity is observed in the narrow pressure range near the disappearance point of the FM2 phase, where the temperature dependence of resistivity follows the non-Fermi liquid form of T^<1.6>. From these experimental facts, the superconductivity is considered to be associated with the critical fluctuation with the disappearance of FM2 phase.
社団法人日本物理学会の論文
2004-11-15