Experimental Study of Perpendicular Write Head Field Rise Time

Author

Xing, Xinzhi ; Taratorin, Alexander ; Klaassen, Klaas B.

Author_Institution

Hitachi San Jose Res., Hitachi Global Storage Technol., San Jose, CA

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2181

Lastpage

2183

Abstract

In this paper, a simple technique that can determine the write head field rise time based on electrical measurements is presented. A model that relates the head electrical properties to the frequency dependent head efficiency epsiv(omega) and head field rise time tau is described in detail. This method only requires knowledge of the complex impedances of a magnetically saturated head and an unsaturated head. The results obtained are verified with recording measurements of the rise time for the same heads. Very good agreement was found for all heads. It was also found that the presence of a soft underlayer does not seem to significantly affect the measured head field rise time. Therefore, it is concluded that the head field rise time is determined by the yoke structure and not by the pole tip area

Keywords

magnetic heads; complex impedances; electrical measurements; frequency dependent head efficiency; magnetic saturation; perpendicular write head field rise time; pole tip area; yoke structures; Coils; Electric variables measurement; Electrical resistance measurement; Impedance measurement; Magnetic field measurement; Magnetic flux; Magnetic heads; Magnetic recording; Saturation magnetization; Time measurement; Impedance; recording head; rise time;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.894340

Filename

4202968