The characterisation of magnetic pigment dispersions using pulsed magnetic fields

Blackwell, Jennifer; O’Grady, K.; Nelson, Neal K.; Sharrock, M.P.

doi:10.1016/s0304-8853(03)00463-3

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2010

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“…One of our goals for Bulletpack is to mimic the process used to fabricate tape media [17]: we believe that such an approach is likely to represent the physics of the actual packing process and constrain the packing statistics in a realistic way. Fabrication is begun by coating a wet dispersion of magnetic particles-fully-formed, so a "growing seeds" algorithm does not imitate this step-on a substrate.…”

Section: B Design Considerationsmentioning

confidence: 99%

Bulletpack: A Fast, Flexible Packing Algorithm for Particulate Media

Biskeborn

Jubert

2010

IEEE Trans. Magn.

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We introduce a new particle packing code that mimics the process used to fabricate particulate media. It achieves realistic packing fractions, with values well above 40%, and high computational efficiency for nearly arbitrary particle shapes and distributions of geometric and magnetic properties. We perform recording simulations in combination with a modified version of the Magpar micromagnetic code to illustrate the importance of realistic packing. We find for the case of non-oriented platelets that the broadband signal-to-noise ratio drops by 1 dB when the packing fraction is reduced from 43% to 30%; this result is in agreement with scaling models.

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Section: B Design Considerationsmentioning

confidence: 99%