Role of M-H loop slope of media for recording properties in perpendicular magnetic recording
ABSTRACT Perpendicular magnetic recording media with a high resolution and a low noise property were studied using a micromagnetic simulation. It was suggested that the introduction of a small separation between the adjacent grains is effective to obtain such media increasing the perpendicular M-H loop slope without increasing the domain size. The separation is thought to reduce the demagnetizing field acting on the magnetic grains increasing the M-H loop slope of the grains.
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ABSTRACT: Highly textured  FePt:C nanocomposite thin films, deposited directly on thermally oxidized Si wafers, are obtained by multilayer deposition plus subsequent thermal annealing. Nanostructures, crystalline orientations, interactions, and magnetic properties are investigated by transmission electron microscopy (TEM), X-ray diffraction (XRD), magnetic force microscopy, and magnetic measurements. The formation of the ordered L1<sub>0</sub> phase is confirmed by XRD, and only visible (00l) peaks indicate a high degree of the  texture. TEM observation reveals that FePt grains are embedded in the C matrix and appear to be well isolated. The FePt grains are very uniform with average sizes about 5 nm.IEEE Transactions on Magnetics 08/2004; · 1.42 Impact Factor
- Journal of Magnetism and Magnetic Materials 01/2013; 345:165-170. · 1.83 Impact Factor