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PtCo/TbFeCo ferro-/ferri-exchange coupled double layer film (ECDL) was fabricated for high density magnetooptical (MO) data storage. At room temperature (RT), the PtCo film is in-plane magnetized and acts as a mask layer. However, at elevated temperature, it tus to be out-of-plane magnetized because of the strong exchange coupling interactions with the TbFeCo layer. Therefore, this ECDL film has a magnetically induced superresolution (MSR) effect.Combining it with the good Kerr signal at short wavelength, the PtCo/TbFeCo film can be a good candidate for blue laser-MSR MO data storage.