Title :
Giant magnetoresistance in narrow stripes
Author :
Daughton, J.M. ; Bade, P.A. ; Jenson, M.L. ; Rahmati, M.M.M.
Author_Institution :
Nonvolatile Electronics, Inc., Plymouth, MN, USA
fDate :
9/1/1992 12:00:00 AM
Abstract :
A simple model for giant magnetoresistance in thin-film magnetic sandwiches was developed. Giant magnetoresistance (GMR) and anisotropic magnetoresistance (AMR) were measured using 1.5-μm to 10-μm-wide×70-μm-long test structures etched from magnetic sandwiches with two magnetic films and a thin nonmagnetic conducting interlayer. Magnetic fields were applied to the sandwiches by passing current through the stripes and by applying external fields. The magnetic layers were sputtered (80-20) NiFe, NiFeCo, and CoFe films in the thickness range of 20 Å to 140 Å. The conducting interlayers were sputtered nonmagnetic films of Cu or alloys of CuNi and CuZn in the thickness range of 15 Å to 50 Å. The range of observed GMR was from 0.2% to 6%
Keywords :
cobalt alloys; iron alloys; magnetic multilayers; magnetoresistance; nickel alloys; sputtered coatings; 15 to 15 Å; 20 to 140 Å; CoFe-Cu-CoFe; NiFe-Cu-NiFe; NiFe-CuNi-NiFe; NiFeCo-Cu-NiFeCo; NiFeCo-CuZn-NiFeCo; anisotropic magnetoresistance; giant magnetoresistance; magnetic films; model; narrow stripes; sputtered films; thickness range; thin nonmagnetic conducting interlayer; thin-film magnetic sandwiches; Anisotropic magnetoresistance; Conductive films; Copper alloys; Giant magnetoresistance; Magnetic anisotropy; Magnetic field measurement; Magnetic films; Perpendicular magnetic anisotropy; Sputter etching; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
