摘要
We report a novel bi-layer thin film structure for high density magneto-optical （MO） data storage, which combines the advantages of blue wavelength and magnetically induced superresolution （MSR） recording. A double-layer system of exchange-coupled light rare-earth （LRE） element doped NdGdFeCo and traditional TbFeCo is used as the recording medium. The experimental results demonstrate that this NdGdFeCo/TbFeCo double layer has large Kerr rotation under blue wavelength. Centre aperture detection （CAD） MSR effect with temperature rising is also observed. Theoretical calculation is also carried out to verify the experimental results. These results collectively suggest that the new bilayer structure is very promising in next generation high density MO data storage.
We report a novel bi-layer thin film structure for high density magneto-optical （MO） data storage, which combines the advantages of blue wavelength and magnetically induced superresolution （MSR） recording. A double-layer system of exchange-coupled light rare-earth （LRE） element doped NdGdFeCo and traditional TbFeCo is used as the recording medium. The experimental results demonstrate that this NdGdFeCo/TbFeCo double layer has large Kerr rotation under blue wavelength. Centre aperture detection （CAD） MSR effect with temperature rising is also observed. Theoretical calculation is also carried out to verify the experimental results. These results collectively suggest that the new bilayer structure is very promising in next generation high density MO data storage.
基金
Supported by the National Natural and Science Foundation of China under Grant No 60607009, the Shanghai Leading Academic Discipline Project （P1502）, and the Innovation Programme of Shanghai Municipal Education Commission （07ZZ166）.
