Satoshi Fukushima

Pressure-Induced Superconductivity Emerging from Antiferromagnetic Phase in CeNiGe3

The antiferromagnet CeNiGe 3 exhibits superconductivity under pressure. The Neel temperature initially increases with increasing pressure up to 3 GPa and then becomes zero at a critical pressure ( ...

Pressure-Temperature Phase Diagram and Superconductivity in UIr

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.

Transport and magnetic properties of pressure-induced insulating phase in PrFe4P12

We have studied the physical properties of a pressure-induced insulating phase in PrFe 4 P 12 via Hall effect, 31 P-NMR and magnetization measurements under quasi-hydrostatic pressure. In the Hall ...