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Yamamoto Setsuo

Affiliate Master Yamaguchi University

Read spacing loss in perpendicular magnetic recording

Journal of Magnetics Society of Japan Volume 9 Issue 2 Page 73-78
published_at 1985
Title
垂直磁気記録の再生スペーシング損失
Read spacing loss in perpendicular magnetic recording
Creators Yamamoto Setsuo
Creators 中村 慶久
Creators 岩崎 俊一
The read spacing losses in perpendicular magnetic recording have been investigated experimentally for various combinations of heads and media. The spacing loss coefficient, K, which is the slope when the spacing loss is plotted versus d/λ, has been measured for sinusoidal magnetization. The results show that for a single layer medium, K is almost the same as that in longitudinal recording, and that for a double layer medium, the K value is large at long wavelengths and becomes small with decreasing wavelength to the value less than 54.6. Particularly for a ring head, a striking wavelength dependence of K is observed. Such a wavelength dependence results from the change of the distribution and the magnitude of the head sensitivity function with spacing. Nevertheless in digital recording, the deterioration in recording density characteristics with increasing spacing is small, even at low densities, because of the contribution of harmonics in output singnals.
Languages jpn
Resource Type journal article
Publishers 日本応用磁気学会
Date Issued 1985
File Version Not Applicable (or Unknown)
Access Rights metadata only access
Relations
[ISSN]0285-0192
[NCID]AN0031390X
info:doi/10.3379/jmsjmag.9.73
[isVersionOf] [URI]http://www.wdc-jp.com/msj/journal/index.html
Schools 大学院理工学研究科(工学)