Full-track profile derivative method for track width measurements of magnetic recording head

Author

Lin, Zhong-Heng ; Lam, Terence ; Che, Xiaodong ; Sui, Xiaoyu

Author_Institution

Hitachi Global Storage Technol. Inc, San Jose, CA, USA

Volume

41

Issue

10

fYear

2005

Firstpage

3067

Lastpage

3069

Abstract

Since a full-track profile is the convolution of reader response function of magnetic field and magnetization distribution of data track, its derivative depends strongly on the spatial function of magnetoresistive sensor sensitivity, especially regarding information about magnetic read width (MRW) and side reading. Therefore, effectively extracting this information from the derivative of a full-track profile allows the possibility to obtain accurate value of MRW and to calculate the effect of side reading on magnetic write width (MWW) of magnetic recording heads. How to achieve this goal will be discussed in this paper.

Keywords

magnetic fields; magnetic heads; magnetic sensors; magnetisation; magnetoresistive devices; perpendicular magnetic recording; MRW; full-track profile method; magnetic field; magnetic heads; magnetic read width; magnetic recording head; magnetization distribution; magnetoresistive sensor; perpendicular magnetic recording; track width measurement; Convolution; Data mining; Equations; Magnetic field measurement; Magnetic heads; Magnetic recording; Magnetic sensors; Magnetization; Magnetoresistance; Perpendicular magnetic recording; Magnetic heads; magnetic recording; perpendicular magnetic recording; recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.855231

Filename

1519209