Low-temperature specific heat of Ce(Ru1-xRhx)(2)Si-2 and (Ce1-xLax)Ru2Si2

We have measured the specific heat by a thermal relaxation method on about 10 mg single crystalline samples of Ce(Ru1-xRhx)(2)Si-2 (x=0.1, 0.15, 0.3 and 0.4) and (Ce0.87La0.13)Ru2Si2 from 1.5 K to 20 K. Ce(Ru1-xRhx)(2)Si-2 with x=0.1 and 0.15 and (Ce0.87La0.13)Ru2Si2 show magnetic phase transition and the temperature dependence of the magnetic specific heat, C-mag, obeys approximately the power law C-mag = At-n below the ordering temperatures with n=1.4 for both the Ce(Ru1-xRhx)2Si(2) and with n=1.1 for (Ce1-xLax)Ru2Si2. The estimated electronic specific hear coefficient gamma for x=0.1 is nearly of the same value (= 360 mJ/mol K-2) as for CeRu2Si2. The C-mag/T for both x=0.3 and 0.4 diverges logarithmically for T --> 0, which suggests the so-called nan-Fermi liquid behavior.