  We find that the long-range magnetic ordering is absent and electrical
conduction suppressed in Y$_{1.7}$Bi$_{0.3}$Ir$_2$O$_7$/YSZ(100) thin film
prepared by pulsed laser deposition. The sharp down-turn of inverse magnetic
susceptibility X-1(T) from the conventional Curie-Weiss behaviour below T* ~
168K suggests an inhomogeneous ferromagnetic Griffiths like phase. The
transport and magnetic properties are explained on the basis of the coexistence
of mixed oxidation states of Ir, (i.e. Ir4+ and Ir3+) leading to non-magnetic
defects and reduction in t2g density of states at the Fermi level.
