Measurement of Transition Shape, Width, and Total Magnetic Spacing

Abstract

Measurement of the harmonics of low-frequency all-ones patterns and the shield-to-shield read gap are used here to reconstruct the spacing, the isolated transition shape, and the width parameter for longitudinal recording. For perpendicular, the media thickness parameters and data at two spacings are needed to accurately determine the spacing and width parameter.The 90% to +90% transition shapes fits well to a tanh( ) shape for longitudinal and perpendicular recording.

Analysis of magnetization transition in perpendicular magnetic recording for narrow transition width

“…Readback loss was compensated according to the procedure described in Ref. [6]. First, the reproduced spectrum (50 kFCI) was sampled with a spectrum analyzer.…”

Perpendicular recording write process modeling issues

“…Comparison between this model and the more realistic hyperbolic tangent model [10] is provided in Fig. 4.…”

Precessional switching on exchange biased patterned magnetic media with perpendicular anisotropy

“…6 However, a critical issue is the manufacturability of such tilted anisotropy media. 9 The main drawback of this proposed design is that shielding will be required, in both the down and cross-track directions, to avoid that the field causes multipass erasure. 9 The main drawback of this proposed design is that shielding will be required, in both the down and cross-track directions, to avoid that the field causes multipass erasure.…”