Fabrication of head-flyable nanohole patterned media and dynamic write/read measurement with GMR head

Author

Kikuchi, H. ; Nakao, H. ; Yasui, K. ; Nishio, K. ; Morikawa, T. ; Matsumoto, K. ; Masuda, H. ; Itoh, K.

Author_Institution

Yamagata Fujitsu Ltd., Japan

fYear

2005

fDate

4-8 April 2005

Firstpage

1371

Lastpage

1372

Abstract

A method to fabricate head-flyable alumina nanohole patterned media is reported. Alumina nanoholes are formed by DC anodization of Al layer (500 nm) with anodizing voltage of 25 V. The pore diameter is widened by dilute phosphoric acid in order for Co to fill easily into these holes by AC electrodeposition. Surface polishing of the media is done to smooth the surface and carbon is used as a protective coating layer which is lubricated and tape burnished to assure head flying. The write-read characteristics are measured by Guzik system with latest merge type magnetic head. Results show that detailed GMR readback signals show correlation with the nanohole array location.

Keywords

alumina; anodisation; burnishing; carbon; electrodeposition; giant magnetoresistance; lubrication; magnetic heads; nanopatterning; nanoporous materials; polishing; protective coatings; 25 V; 500 nm; AC electrodeposition; Al₂O₃; DC anodization; GMR readback signals; Guzik system; carbon; dilute phosphoric acid; dynamic write-read measurement; head-flyable alumina nanohole patterned media; merge type magnetic head; nanohole array location; pore diameter; protective coating layer; surface polishing; Density measurement; Fabrication; Glass; Ion beams; Laboratories; Magnetic heads; Magnetic recording; Self-assembly; Surface topography; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1464115

Filename

1464115