Effect Of Vanadium Substitution Of Cobalt In Ndco2si2

In NdCo2Si2, partial substitution of Co by V having a larger atomic radius results in negative pressure affecting the magnetic properties of the compound. The samples Nd(Co1-xVx)(2)Si-2 (x = 0, 0.20, 0.35) have been prepared and characterized using X-ray diffraction. The parent compound NdCo2Si2 is antiferromagnetic with T-N of 34 K whereas the temperature dependence of inverse susceptibility in the doped samples show ferrimagnetic behaviour below 45 K. From the magnetic field dependence of magnetization and the coercive fields obtained from hysteresis loops, the doped samples exhibit ferromagnetism below approximate to 20 K. The specific heat studies compare the magnetic transitions in the parent and doped samples. Nd(Co0.65V0.35)(2)Si-2 shows a magnetoresistance of 15% at 4 K.