Write field measurements of a perpendicular head on a soft underlayer film

Author

Gokemeijer, N.J. ; Langzettel, Anthony ; Covington, M.

Author_Institution

Seagate Technol., Pittsburgh, PA, USA

Volume

42

Issue

2

fYear

2006

Firstpage

163

Lastpage

165

Abstract

We demonstrate a technique to measure the field of a perpendicular head on a soft underlayer. We built a current-perpendicular-to-the-plane giant magnetoresistive sensor deposited on a soft underlayer and placed it on the write-read contact tester. Scanning a perpendicular head over the device with sub-nm resolution allowed us to map the field spatially and by changing the writer current, obtain saturation curves of both the main pole and the return pole.

Keywords

giant magnetoresistance; magnetic fields; magnetic heads; magnetic sensors; magnetic thin films; magnetoresistive devices; perpendicular magnetic recording; soft magnetic materials; giant magnetoresistive sensor; perpendicular head; saturation curves; soft underlayer film; write field measurements; write-read contact tester; Chemical sensors; Image storage; Magnetic field measurement; Magnetic flux; Magnetic heads; Magnetic recording; Magnetic sensors; Perpendicular magnetic recording; Saturation magnetization; Testing; Devices; information storage; magnetic imaging; magnetic recording heads;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.861770

Filename

1580668