Correlation among long-range ordered states revealed by pressure versus temperature phase diagram in URu2Si2

被引：25

作者：

Uemura, S ^{[1
]}

Motoyama, G

Oda, Y

Nishioka, T

Sato, NK

机构：

[1] Nagoya Univ, Grad Sch Sci, Dept Phys, Nagoya, Aichi 4648602, Japan

[2] Kochi Univ, Fac Sci, Dept Mat Sci, Kochi 7808520, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2005年 / 74卷 / 10期

关键词：

URu2Si2; superconductivity; magnetism; heavy fermion; actinides;

D O I：

10.1143/JPSJ.74.2667

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a pressure-temperature phase diagram of URu2Si2 consisting of four states; i.e., a superconducting state, a hidden ordered (HO) state, a large-moment antiferromagnetically (LMAF) ordered state induced under pressure, and a ferromagnetic state that is presumably due to crystal imperfections. Our major observation is that the Superconductivity does not coexist with the LMAF state. Provided that the ferromagnetism is associated with a tiny-moment antiferromagnetically ordered state, we argue that the hidden order parameter has a different symmetry front that of the anti ferromagnetic states, which implies that there is no critical end point in a first-order phase line separating HO from LMAF in the phase diagram.

引用

页码：2667 / 2670

页数：4

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