  We have investigated the electronic and magnetic properties of perovskite
SrRu1-xIrxO3 thin films grown by pulsed laser deposition on atomically-flat
(001) SrTiO3 substrates. SrRuO3 has the properties of a ferromagnetic metal
with Curie temperature 150 K. Substituting Ir for Ru in SrRuO3, films showed
fully-metallic behavior and ferromagnetic ordering, although resistivity
increased and the ferromagnetic TC decreased. Films with x = 0.25 underwent the
metal-to-insulator transition at 75 K, and spin-glass-like ordering at 45 K
with the elimination of ferromagnetic long-range ordering caused by the
electron localization at the substitution sites. In ferromagnetic films,
resistivity increased near-linearly with T, but in paramagnetic film (x = 0.25)
resistivity increased as T3/2. Moreover, observed spin-glass-like (TSG)
ordering with the negative magnetoresistance in film with x = 0.25; validates
the hypothesis that (Anderson) localization favors glassy ordering at amply
disorder limit. These observations provide a promising approach for future
applications and of fundamental interest in 4d and 5d mixed perovskites.
