Magnetization study on the field-induced quantum critical point in YbRh<sub>2</sub>Si<sub>2</sub>
Magnetization study on the field-induced quantum critical point in YbRh<sub>2</sub>Si<sub>2</sub>
We study the field-induced quantum critical point (QCP) in YbRh2Si2 by low-temperature magnetization, M(T), and magnetic Grüneisen ratio, Γmag, measurements and compare the results with previous thermal expansion, β(T), and critical Gr̈neisen ratio, Γcr (T), data on YbRh2(Si0.95Ge0.05)2. In the latter case, a slightly negative chemical pressure has been used …