Evidence for a possible quantum critical point in a Cr-Si alloy doped with Mo

摘要

The magnetic behavior and possibility of quantum criticality in a (Cr_(0.98)Si_(0.02))_(1-y)Mo_y alloy system (0 < y < 0.09) is investigated through electrical resistivity, specific heat, and thermoelectric power measurements in a temperature range 2-350 K. Alloys with 0 < y < 0.011 depict first-order Neel transitions that give way to continuous Neel transitions for 0.011 < = y < = 0.038. The Neel temperature, T_N(y), seems to be suppressed down to 0 K at a critical concentration y_c ~ 0.04.