Cross-Track Resolution of Readers With Shield Tabs

Author

Tuggle, Andrew ; Gider, Savas ; Mauri, Daniele ; Haiwen Xi

Author_Institution

Center for Mater. for Inf. Technol., Univ. of Alabama, Tuscaloosa, AL, USA

Volume

50

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1

Lastpage

4

Abstract

We study the effects of patterned shield tabs on the cross-track resolution of TMR read heads. Patterning tabs in the cross-track direction expands the design space in which to tune the magnetic width of the reader. We use a finite-element micromagnetic code to explore separately the effects of both the lower and upper shield tabs´ thicknesses and intrinsic moments. Cross-track profiles can be narrowed by increasing the moment of a thin upper shield tab. The slight widening of profiles due to a bottom shield tab may not be detrimental to overall bit density and balanced by an overall gain in down-track resolution.

Keywords

finite element analysis; magnetic heads; magnetic recording; micromagnetics; TMR read heads; bit density; bottom shield tab; cross-track direction; cross-track profiles; cross-track resolution; design space; down-track resolution; finite-element micromagnetic code; intrinsic moments; lower shield tabs thicknesses; magnetic reader width; magnetic recording; patterned shield tabs effects; thin upper shield tab moment; upper shield tabs thicknesses; Magnetic heads; Magnetic noise; Magnetic separation; Magnetic shielding; Media; Saturation magnetization; Tunneling magnetoresistance; Magnetic recording; TMR read head; magnetic sensors; nanoscale devices;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2326077

Filename

6971788