Micromagnetic Modeling of Particulate Tape Media with Increasing Perpendicular Orientation

Journal of applied physics（2012）SCI 3区

Cited 9|Views6

Abstract

Micromagnetic simulations are used to investigate the evolution of the broad-band signal-to-noise ratio (BB-SNR) of barium ferrite particulate tape media with increasing perpendicular orientation. The structure of the particulate media is reproduced with a packing algorithm that mimics the medium fabrication process and includes the orienting effect of a perpendicular magnetic field applied during the drying process. Recording simulations are performed to extract the media BB-SNR and the transition width parameter. The simulations reproduce the experimentally observed improvement of BB-SNR with the medium perpendicular squareness and demonstrate that this improvement basically results from the reduction of the transition width parameter. A simple write model is proposed that allows prediction of BB-SNR with the degree of orientation of the particulate media.

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