Cooperative phenomenon of ferromagnetism and unconventional superconductivity in UGe2:: A 73Ge-NQR study under pressure

被引：19
|
作者：
Harada, A [1 ]
Kawasaki, S
Kotegawa, H
Kitaoka, Y
Haga, Y
Yamamoto, E
Onuki, Y
Itoh, KM
Haller, EE
Harima, H
机构：
[1] Osaka Univ, Grad Sch Engn Sci, Dept Mat Engn Sci, Toyonaka, Osaka 5608531, Japan
[2] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
[3] Osaka Univ, Grad Sch Sci, Dept Phys, Toyonaka, Osaka 5600043, Japan
[4] Keio Univ, Dept Appl Phys & Physicoinformat, Yokohama, Kanagawa 2238522, Japan
[5] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA
[6] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
[7] Kobe Univ, Fac Sci, Dept Phys, Kobe, Hyogo 6578501, Japan
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2005年 / 74卷 / 10期
关键词：
itinerant ferromagnetism; unconventional superconductivity; UGe2; NOR under pressure; first-order phase transition;
D O I：
10.1143/JPSJ.74.2675
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report on a cooperative phenomenon of ferromagnetism and unconventional superconductivity (SC) in UGe2 through the measurements of Ge-73 nuclear-quadrupole-resonance (NQR) under pressure (P). The NQR spectra evidenced phase separation into ferromagnetic and paramagnetic phases in the vicinity of P-c similar to 1.5 GPa, pointing to a first-order transition. The measurements of nuclear-spin-lattice-relaxation-rate I/T-1 revealed that SC emerges under the background of ferromagnetism, but not of the paramagnetic phase.
引用
收藏
页码：2675 / 2678
页数：4
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