Non-fermi liquid behavior in Ce(Ru1-xRhx)(2)Si-2 (x=0.4 and x=0.5)

We have studied the magnetic properties of the mixed compound Ce(Ru1-xRhx)( 2)Si-2 (0.3 less than or equal to x less than or equal to 0.5) by means of specific heat and magnetization measurements with single crystalline sample s. The C/T, specific heat divided by T, shows a logarithmic temperature dep endence between 0.1 and 10 K for x = 0.4 and 0.5 and the susceptibility con forms to 1 - T-1/2 and 1 - T-1/3 in the temperature range of 1.8 K and 10 K respectively. These non-Fermi liquid behaviors are studied on the basis of self-consistent renormalization theory and Kondo disorder model. However, their magnetic properties seem not to be explained simply by such theories, especially as inferred from very large non-linear susceptibility.