The dynamic coupling of the slider to the disk surface and its relevance to take-off height

Citation
D. Gonzalez et al., The dynamic coupling of the slider to the disk surface and its relevance to take-off height, IEEE MAGNET, 37(4), 2001, pp. 1839-1841
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON MAGNETICS
ISSN journal
0018-9464 → ACNP
Volume
37
Issue
4
Year of publication
2001
Part
1
Pages
1839 - 1841
Database
ISI
SICI code
0018-9464(200107)37:4<1839:TDCOTS>2.0.ZU;2-2
Abstract
Recent studies have attempted to correlate take-off height (TOH or Glide Av alanche) of rigid disks to their topography. Roughness average, mean peak h eight, and waviness have been emphasized, but no model has been proposed th at takes into account the dynamic response of the glide slider to the spati al frequency of the disk topography. In this paper, we calculate the freque ncy response of glide sliders to disk inputs of various wavelengths, using an air-bearing solver. This calculated trans er unction is then used to fil ter the one-dimensional disk topography, obtained with a conventional stylu s profiler, using its complex Fourier transform. From the filtered profile, a mean peak height R-pm can be obtained which correlates well with actual TOH values. The slope is close to unity as expected from a first-principle model. Schemes to break down the wavelength range of interest into short (r oughness) and long (waviness) parts will be demonstrated, as well as the pr actical use of optical profilers.