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Improvement of Magnetic Force Microscope Resolution and Application to High-Density Recording Media

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5 Author(s)
Futamoto, M. ; Fac. of Sci. & Eng., Chuo Univ., Tokyo, Japan ; Hagami, T. ; Ishihara, S. ; Soneta, K.
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Magnetic force microscope (MFM) tips are prepared by coating magnetic materials on nonmagnetic Si tips with 4 nm radius. The effects of magnetic material and coating thickness on the MFM resolution and the switching field are investigated. MFM resolutions better than 8 nm have been confirmed with tips coated with soft magnetic or hard magnetic materials with optimized thicknesses. The switching field varies in a wide range 0.1-3.0 kOe depending on the coating material and the coating thickness (10-80 nm). High-resolution MFM tips are applied to the observations of magnetization structures of perpendicular and bit-patterned media samples. Magnetization structures of less than 20 nm in scale are clearly observed.

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Magnetics, IEEE Transactions on  (Volume:49 ,  Issue: 6 )