Effect of alumina spacer in trilayer shared pole structures in GMR recording heads

Author

Sharma, Neelam ; Johnston, Adrian ; O´Kane, C. ; Macken, D.

Author_Institution

Seagate Technol., Londonderry, UK

fYear

2002

Abstract

Summary form only given. The shared pole in a merged recording head design serves as the reader shield and a part of the writer circuit. A good shared pole design should provide permeable path to the write flux, efficiently shield the reader from adjacent recorded transitions and prevent magnetic coupling between the reader and writer. This paper reports the feasibility of using Al/sub 2/O/sub 3/ as the nonmagnetic and non-conducting spacer in a trilayer shared pole structure of type - NiFe/Al/sub 2/O/sub 3/ (x)/NiFe, with x = 0.1-1.0 /spl mu/m. The shared pole structure was integrated into head design and its effect on head stability and performance was studied.

Keywords

alumina; giant magnetoresistance; magnetic heads; magnetoresistive devices; stability; 0.1 to 1 micron; GMR recording heads; NiFe-Al/sub 2/O/sub 3/-NiFe; alumina spacer; head performance; head stability; magnetic coupling prevention; merged recording head design; nonconducting spacer; nonmagnetic spacer; trilayer shared pole structures; Disk recording; Drives; Magnetic domain walls; Magnetic domains; Magnetic flux; Magnetic heads; Magnetic shielding; Probes; Space technology; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International

Conference_Location

Amsterdam, The Netherlands

Print_ISBN

0-7803-7365-0

Type

conf

DOI

10.1109/INTMAG.2002.1000838

Filename

1000838