Magnetization curling in perpendicular iron particle arrays (alumite media)

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Huysmans, G.T.A. and Lodder, J.C. and Wakui, J. (1988) Magnetization curling in perpendicular iron particle arrays (alumite media). Journal of Applied Physics, 64 (4). pp. 2016-2021. ISSN 0021-8979

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Abstract:Alumite has been investigated by measuring the hysteresis loops for different field directions to determine the influence of the particle interactions in an perpendicular oriented particle medium on the angular dependence of the coercivity and the hsyteresis loss. Alumite is an ideal model material for this purpose because the particle size and particle distance are well defined and can be varied independently. It is shown that the coercivity of the particle array can be identified with the nucleation field of one single particle for perpendicular fields. It is clear from the radius dependence of the coercivity that the reversal mode is the curling mode. The angular dependence of the coercivity does not agree with the well-known theoretical curve for one particle, which is caused by the particle interactions. The same can be said about the angular dependence of the hsyteresis loss. Calculations of hysteresis loops of particle arrays with interacting particles show the influence of these interactions on the angular dependence of the coercivity.
Item Type:Article
Copyright:© 1988 American Institute of Physics
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Link to this item:http://purl.utwente.nl/publications/66101
Official URL:http://dx.doi.org/10.1063/1.341758
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