A comparison of longitudinal and perpendicular recording based on optimum perpendicular transition

Koren, Norman L.

doi:10.1109/tmag.1985.1063959

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…In a recent publication [9] a possible differentially connected dual element MR head, that can provide high resolution, has been mentioned. Also in a previous publication 2-D calculation of isolated pulses were reported [4], where large undershoots were shown. Experimental measurements did not show any large undershoot and in this paper we show that the 3-D effects practically eliminate all undershoots in such connections.…”

Section: Media With Underlavermentioning

confidence: 85%

“…The sensitivity function of the MR head, Hy(z,y,t), on the media is obtained by wrapping a coil around the active area of the MR film and exciting the coil by unit current [7]. The magnetization in the disk is assumed to have only vertical components and has the mathematical form [4] shown in equation (2). We also assume that the magnetization is uniform across 'the track and also in the vertical direction.…”

mentioning

confidence: 99%

“…Koren [4] has shown that for ring head recording, 6' may be slightly less than the coating thickness 6. For the calculations presented here, we assume the recorded depth and the coating thickness to be equal.…”

mentioning

confidence: 99%

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3D analysis of MR readback on perpendicular medium

1991

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A 3-D analysis of MR read on perpendicular media using the reciprocity method is presented. We show that the conduction of magnetic flux, obtained form an equivalent reciprocity field, away from the active area is an important phenomenon for this structure, and may introduce error if 2-D analysis is used. We also examine the effect of shield width and show that when shield width is equal to the with of the active area of the MR head, 3-D analysis closely resembles the 2-D results. Finally we extend our calculation to a differentially connected dual element MR head for perpendicular recording.

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Section: Media With Underlavermentioning

confidence: 85%

mentioning

confidence: 99%