Title :
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
fDate :
11/1/1995 12:00:00 AM
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 μr 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;
Journal_Title :
Magnetics, IEEE Transactions on
