Observation of underlayer domain noise in perpendicular recording disks

Darragh, N.; Mapps, D.J.; Donnelly, T.; Wade, G.; Hoinville, J. R.

doi:10.1109/20.281288

Search citation statements

Order By: Relevance

Paper Sections

Select...

Introduction2

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1994

2005

Publication Types

Select...

Article5

Book1

Relationship

Self Cite0

Independent6

Authors

Journals

Cited by 13 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There were some investigations to evaluate the noise from double-layered perpendicular recording media [4][5][6]. The medium noise signal from double-layered perpendicular recording media have distinguished high-and low-frequency nature.…”

Section: Introductionmentioning

confidence: 99%

Distributions and dynamics of spike noise in double-layered perpendicular recording media

Kurosawa

Honda

2005

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Distributions and dynamics of spike noise in double-layered perpendicular recording media

Kurosawa

Honda

2005

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

“…This, together with the narrow track width, decreases the head field significantly at high densities [2]. Furthermore, the SUL also deteriorates the readback resolution and sensitivity [3], [4] as well as introduces an extra noise due to Manuscript the domain walls formed in the SUL [5], which will directly cause a loss of signal-to-noise ratio (SNR). In terms of fabrication, depositing SUL and the interlayer also increases the cost of the media.…”

Section: Introductionmentioning

confidence: 99%

Micromagnetic Modeling of SNR Performance of Longitudinal and Perpendicular Media With Various Head/SUL Combinations

Bai

Torabi²,

Benakli³

et al. 2004

IEEE Trans. Magn.

View full text Add to dashboard Cite

Using a dynamic micromagnetic write model, we have studied the spectral signal-to-noise ratio (SNR) performance of perpendicular media using a ring head without soft underlayer (SUL) and compared it with that of longitudinal media. With optimized exchange coupling of the media, the ring head shows good writability on the perpendicular media without SUL. At a linear density of 600 kfci, the ring head/perpendicular media essentially has no SNR gain over the longitudinal media, whereas going to 1000 kfci, the perpendicular media has an advantage of about 4 dB over the longitudinal. Comparison of the ring head (RH) without SUL was also made with the monopole head (MPH) and shielded pole head (SPH), both with SUL. RH and MPH both have about the same Stoner-Wohlfarth field gradient and SNR performance, whereas at the SNR plateau, SPH yields an SNR about 4-5 dB higher than RH and MPH, thanks to the high field gradient.

show abstract