High density magneto-optical data storage based on magnetically induced super resolution and blue wavelength

In this paper, we report the fabrication and characterization of two kinds of mediums for magnetically induced superresolution (MSR) and blue wavelength magneto-optical data storage. Both NdGdFeCo/TbFeCo and Pt3Co/TbFeCo exchange coupled double layer structures show good MSR effect. At room temperature (RT), NdGdFeCo and Pt3Co have in-plane magnetization, however, with temperature rising, they become out-of-plane magnetized and copy the bit information of TbFeCo because of strong exchange coupling. This suggests that both of the double layer films are good candidates for MSR/blue wavelength magneto-optical data storage.