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The dependence of the remanence curves of particulate media on the initial magnetic configuration

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4 Author(s)
Chantrell, R.W. ; Sch. of Phys. & Astron., Lancashire Polytech., Preston, UK ; Fearon, M. ; Schwab, E. ; Veitch, R.

The isothermal remanence curve of a particulate recording medium is shown experimentally to depend upon the method used to achieve the demagnetized state. As-prepared powder samples exhibit larger initial remanence slopes than after AC field demagnetization. This can be interpreted in terms of a higher degree of correlation introduced by the particle-particle interactions during the demagnetization process. Theoretical calculations using a Monte Carlo model give good qualitative agreement with experimental data

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Magnetics, IEEE Transactions on  (Volume:26 ,  Issue: 1 )