Pressure-induced superconductivity in UIr
Pressure-induced superconductivity in UIr
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DOI：
10.1143/jpsj.73.3129
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发表时间：
2004-11-01
影响因子：
1.7
通讯作者：
Onuki, Y
中科院分区：
文献类型：
--
作者：
Akazawa, T;Hidaka, H;Onuki, Y
在 UIr 中发现了压力引起的超导性，没有反演对称性。通过高压下的电阻率和磁化强度测量来研究压力-温度相图。相图由两个磁相组成，低压下的类伊辛铁磁相（FM1）和高压下沿[101]方向具有小铁磁分量的另一个磁相（FM2）。在 FM2 相消失点附近的窄压力范围内观察到超导性，其中电阻率的温度依赖性遵循 T-1.6 的非费米液体形式。从这些实验事实来看，超导性被认为与FM2相消失的临界涨落有关。
Pressure-induced superconductivity is found in UIr 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.