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Articles you may be interested inThe effects of oxygen on intergranular exchange and anisotropy dispersion in Co ∕ Pd multilayers for perpendicular magnetic recording media J. Appl. Phys. 99, 08E708 (2006); 10.1063/1.2162487Reverse dc erase medium noise analysis on exchange-coupling effect in coupled granular/continuous perpendicular recording media

Articles you may be interested inRecording performance of CoCrPtO perpendicular media with single-domain hard magnet-biased soft magnetic underlayers J. Appl. Phys. 99, 08E702 (2006); 10.1063/1.2159409Reverse dc erase medium noise analysis on exchange-coupling effect in coupled granular/continuous perpendicular recording media A readback model is developed to study characteristics of perpendicular recording media with a soft underlayer. The model is applied to an experimental perpendicular recording media represented by Voronoi cells. The readback voltage from this model shows dependence both on the transition length and the fly-height separately. A roll-off curve produced from reading continuous, perfect arctangent transition media is compared to experimental results to obtain the transition length and the fly height. The calculated autocorrelation signal to noise ratio ͑SNR͒ from the model with Voronoi grain based media compared to those obtained from a particular example shows cluster forming with areas equal to about three times the grain size. This reduces the media SNR by about 4.7 dB. This readback model therefore allows SNR measurement to be converted to detailed understanding of the media structure.