Performance of yoke type GMR heads

Author

Folkerts, W. ; Kools, J.C.S. ; de Nooijer, M.C. ; Ruigrok, J.J.M. ; Postma, L. ; Lenssen, K.-M.H. ; Somers, G.H.J. ; Coehoorn, R.

Author_Institution

Philips Res. Lab., Eindhoven, Netherlands

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

2591

Lastpage

2596

Abstract

Yoke type spin valve giant magnetoresistive (GMR) heads with a track width of 70 and 10 μm are studied. The head design has the sensor on top. The output of the heads is found to be up to 10 times larger than similar heads with a 30 nm Ni-Fe MRE linearized using a barberpole. The crucial role of the free layer permeability μ_r and the ferromagnetic interlayer coupling with respect to the head performance is analysed. This is argued to give design rules for the GMR material. The applied FeMn exchange biasing is shown to become unreliable above T=105°C

Keywords

giant magnetoresistance; magnetic heads; magnetic multilayers; magnetoresistive devices; 10 micron; 105 C; 70 micron; FeMn exchange biasing; NiFe-FeMn; barberpole; ferromagnetic interlayer coupling; free layer permeability; linearized Ni-Fe MRE; sensor design; spin valve giant magnetoresistive heads; yoke type GMR heads; Conductors; Ferrites; Magnetic anisotropy; Magnetic flux; Magnetic heads; Magnetic sensors; Nonhomogeneous media; Perpendicular magnetic anisotropy; Spin valves; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.490064

Filename

490064