Non-Fermi liquid properties of Ni$_{1-x}$V$_{x}$ close to the disordered ferromagnetic quantum critical point

Resistivity and magnetization data of the d-metal alloy Ni$_{1-x}$V$_{x}$ are presented in the vicinity of the critical Vanadium concentration of $x_{c}\approx $11.6{\%} where the onset of long-range ferromagnetic order is suppressed to zero temperature. The resistivity ($\rho )$ displays power laws in temperature (T) ($\rho $-$\rho_{o}$ $\sim$ T$^{n})$ with non-Fermi liquid values of n(x)\textless 2 close to x$_{c}$. Above x$_{c}$ the dependence of the magnetic susceptibility on T and magnetic field is best described by simple, non-universal, power laws with a Griffiths exponent $\alpha $(x), indicating fluctuating magnetic clusters are still present in the paramagnetic phase. Below x$_{c}$ similar $\alpha $(x) exponents reveal clusters in the FM phase, as well. Both $\alpha $(x) and n(x) vary with x and display a minimum at x$_{c}$. These exponents observed in this disordered quantum phase transition are significantly different than the critical exponents expected for a clean ferromagnet.