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Analysis of the dimensional dependence and internal field structure of ferrite head pole tip at saturation

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3 Author(s)
Huei Li Huang ; Dept. of Phys., Nat. Taiwan Univ., Taipei, Taiwan ; Yuh Dar Hsieh ; Kuo, C.S.

When the deep gap field exceeds the onset of the saturation field the fringe-field becomes nonvanishing and retains a plateau value at large distances from the gap corner. The plateau values increase with increasing deep gap field and decrease with the head dimensions; correspondingly, the charge density on the pole surface also increases. The permeability and volume charge distribution near the pole tip corner at large deep gap fields is a sensitive function of the depth below the pole surface and of the extent of the gap saturation. As a result, the divergence of the magnetization in the region immediately below and a fraction of the gap length further below change signs drastically so that the bordering regions are oppositely charged

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Magnetics, IEEE Transactions on  (Volume:31 ,  Issue: 3 )