Unusual behavior of the low-moment magnetic ground state of YbRh2Si2 under high pressure -: art. no. 180403

被引：65

作者：

Plessel, J ^{[1
]}

Abd-Elmeguid, MM

Sanchez, JP

Knebel, G

Geibel, C

Trovarelli, O

Steglich, F

机构：

[1] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[2] CEA Grenoble, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble 9, France

[3] Max Planck Inst Chem Phys Stoffe, D-01187 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.67.180403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-pressure investigations of the ground state properties of the non-Fermi-liquid system YbRh2Si2 (Yb-170-Mossbauer effect, electrical resistance and x-ray diffraction) reveal unusual features that are different from those found in Ce-related systems. We show that the ordered state with a low magnetic moment persists in a very large pressure range up to approximate to10 GPa and is associated with spin fluctuations. At 10 GPa the system undergoes a first-order magnetic phase transition to a high-moment state with mu(Yb)=1.9(1)mu(B) and magnetic ordering temperature T-m=7.5(4) K at 16.5 GPa. A magnetic phase diagram for YbRh2Si2 in the (p,T) space is suggested.

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