2009 Volume 78 Issue 12 Pages 123708
The temperature–magnetic field (T–H) phase diagram of YbRh2Si2 in the vicinity of its quantum critical point is investigated by low-T magnetization measurements. Our analysis reveals that the energy scale T\\star(H), previously related to the Kondo breakdown and terminating at 0.06 T for T→0, remains unchanged under pressure, whereas the antiferromagnetic critical field increases from 0.06 T (P=0) to 0.29 T (P=1.28 GPa), resulting in a crossing of TN(H) and T\\star(H). Our results are very similar to those on Yb(Rh1−xCox)2Si2, proving that the Co-induced disorder can not be the reason for the detachment of both scales under chemical pressure.
This article cannot obtain the latest cited-by information.