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Multiple rare earth metal cations (Gd, Yb, Ho and Pr) were doped in yttrium iron garnet (YIG) nanocrystalline ferrites. Following five samples i.e. YIG (Y₃Fe₅O₁₂), Gd doped YIG (Y_2.8Gd_0.2Fe₅O₁₂), Pr doped YIG (Y_2.8Pr_0.2Fe₅O₁₂), Ho doped YIG (Y_2.8Ho_0.2Fe₅O₁₂) and Yb doped YIG (Y_2.8Yb_0.2Fe₅O₁₂) were prepared using sol-gel auto-combustion synthesis route. The samples were characterized via XRD, FTIR, SEM and VSM whereas VNA was also used to evaluate these samples for high frequency applications. XRD analysis confirms the peaks of garnet ferrites which show cubic phase structure for all YIG doped samples. The lattice constant in all the substituted garnet nanoferrites initially increased and then consequently decreased as the doping increased except for Pr-substituted YIG nanoferrites. This is due to the greater ionic radii of Pr as compared to other doped YIG nanoferrites. FTIR was used to …