On-chip passive inductors are highly required in RFIC. To integrate suitable magnetic materials into RF inductors is a promising method of achieving high-quality and small-size RF inductors, which could not only increase the inductance L and therefore reduce the size, but maintain and even raise the quality factor Q as well. Kinds of integrated magnetic medium inductors are designed. The influences of structure and material parameters on inductor performance are systematically simulated. These results give design instructions to achieve real small-size and high-performance on-chip magnetic inductors.