Abstract
We have carried out a detailed study of the (Ce1_xYx)(2)Ir3Ge5 anti-ferromagnetic compounds across the entire range of substitution 0 < x < 0.33 and report the results of powder X-ray diffraction, magnetic susceptibility, heat capacity, and electrical resistivity measurements to exhibit the anti-ferromagnetic phase temperature (TN) versus substitution x phase diagram. The pure Ce(2)Ir(3)Ge(5 )system indicates anti-ferromagnetic behavior below TN = 9.5 K. Substitution of Y into (Ce1_xYx)(2)Ir3Ge5 compound leads to a decrease in the anti-ferromagnetic phase temperature (T-N). Near x = 0.3, the anti-ferromagnetic transition temperature is suppressed to zero kelvin at an apparent anti-ferromagnetic quantum critical point, without the superconductivity sign, where the temperature dependence of the heat capacity and electrical resistivity in this region reveal non-Fermi Liquid behavior. The above results, for example, the suppressing of TN, maybe a new way to find low-temperature superconductivity in these compounds.