Track edge phenomena in thin film longitudinal media

Su, J.L.; Ju, Kochan

doi:10.1109/20.42309

Cited by 27 publications

(1 citation statement)

References 2 publications

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“…Similarly, note that the onset of erasure is accompanied by the switching of moments at the track edges in the direction of the field. This can be perceived as the slight widening (between the images (B) and (D)) of the regions which separated the tracks, implying the relative ease by which the cross track magnetization components were reoriented by an average angle of 900 [5,8]. The overall result was an apparent shortening of the track width.…”

Section: Methodsmentioning

confidence: 96%

Magnetic imaging in the presence of an external field: erasure process of thin film recording medium

1995

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The evolution of microscopic magnetic structures on a thin film recording medium has been imaged by applying a progressively increasing external magnetic field. Images from magnetic force microscopy with an in situ magnetic field revealed features attributable to probe-induced and sampleinduced effects. The probe effects result in the preferential sensitivity of the MFM imaging to the component of the local sample field in the direction of the probe's magnetization. The reorientation of the probe's magnetization with respect to the Sample plane direction causes the change in instrument response from detecting surface magnetic charges (magnetization divergence sensing) to detecting the surface magnetization distribution. Sample effects are more prominent at higher fields and the micromagnetic features of the recorded patterns follow a characteristic sequence as the unfavorably magnetized areas switch in the direction of the external f i e l d .

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Section: Methodsmentioning

confidence: 96%

Magnetic imaging in the presence of an external field: erasure process of thin film recording medium

1995

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Magnetoresistive heads

Wang

1999

Magnetic Information Storage Technology

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Side-writing phenomena in isotropic film media

Su¹,

Ju²,

Gallagher³

et al. 1991

Journal of Applied Physics

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The isolated readback pulses of magnetoresistive (MR) heads on isotropic film media have been reported to exhibit base-line shifts. We have further observed that for piggyback MR (PMR) heads with thick pole-tip write elements operating at high write currents, an additional base-line shift occurs, thereby producing dual-base-line shifts. This second base-line shift results in anomalous signal-amplitude variations as the transition density increases. Moreover, the onset of the second base-line shift occurs ahead of the readback pulses at a distance equal to the trailing-pole thickness. We attribute the second base-line shift to the trailing-pole side writing, which modifies the magnetic dipole distribution along the track edges prior to the transitions at a distance equal to the trailing-pole thickness.

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Track edge phenomena in thin film longitudinal media

Cited by 27 publications

References 2 publications

Magnetic imaging in the presence of an external field: erasure process of thin film recording medium

Magnetic imaging in the presence of an external field: erasure process of thin film recording medium

Magnetoresistive heads

Side-writing phenomena in isotropic film media

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