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Effect of anisotropy field magnitude distribution on signal-to-noise ratio

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2 Author(s)
Dan Wei ; Dept. of Mater. Sci. & Technol., Tsinghua Univ., Beijing, China ; Liu, Bo

Recording performance is analyzed by a micromagnetic model in two thin film media with different distribution width of the anisotropy field magnitude. With the same Mrδ, the magnetic properties of the two media are almost the same except that the switching slope S* is larger for the medium with narrower distribution. The signal-to-noise ratio (SNR) is calculated for both media versus recording densities. The SNR at recording densities 4800-9000 flux reversals per millimeter is 5-8 dB smaller in the medium with a broad anisotropy magnitude distribution than the SNR in the medium with a sharp distribution

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Magnetics, IEEE Transactions on  (Volume:33 ,  Issue: 5 )