INAC/SPSMS, CEA-Grenoble, 17 rue des Martyrs, F-38054 Grenoble, France.
J Phys Condens Matter. 2010 Apr 28;22(16):164205. doi: 10.1088/0953-8984/22/16/164205. Epub 2010 Mar 30.
We succeeded in growing high quality single crystals of URu(2)Si(2) and performed thermal expansion measurements under pressure. Applying a magnetic field along the [001] direction in the tetragonal structure, the so-called hidden-order phase reappears after the suppression of the antiferromagnetic phase above the critical pressure P(x). We determined the pressure-temperature-field phase diagram for the paramagnetic, hidden-order and antiferromagnetic states for the [Formula: see text] direction. We also present the temperature dependence of the upper critical field H(c2) for [Formula: see text] and [100] determined by the AC specific heat measurements, corresponding to the bulk superconductivity in a high quality single crystal.
我们成功地生长出高质量的 URu(2)Si(2)单晶体，并在压力下进行了热膨胀测量。在四方结构中沿[001]方向施加磁场，在临界压力 P(x)以上抑制反铁磁相后，所谓的隐藏序相重新出现。我们确定了[Formula: see text]方向顺磁、隐藏序和反铁磁态的压力-温度-场相图。我们还通过交流比热测量给出了[Formula: see text]和[100]方向上的上临界场 H(c2)的温度依赖性，对应于高质量单晶中的体超导性。
