Title :
Weakly coupled GMR sandwiches
Author :
Daughton, James M.
Author_Institution :
Nonvolatile Electronics Inc., Plymouth, MN, USA
fDate :
3/1/1994 12:00:00 AM
Abstract :
Thin film structures comprised of two magnetic films sandwiching a nonmagnetic conductor can have magnetoresistance several times larger than conventional anisotropic magnetoresistance materials. If the coupling between magnetizations in the two films is sufficiently small (either parallel or antiparallel), the saturation magnetic field can be sufficiently small for improved read heads. Magnetoresistances, coupling fields, sheet resistivities, current density effects, thermal limits, and magnetostrictions of these structures are described. No fundamental restrictions are found for using these sandwiches in magnetic head applications
Keywords :
current density; magnetic heads; magnetic thin film devices; magnetoresistance; magnetoresistive devices; antiparallel; coupling fields; current density effects; giant magnetoresistance ratio; magnetic films; magnetic head applications; magnetoresistance; magnetostrictions; nonmagnetic conductor; parallel; read heads; saturation magnetic field; sheet resistivities; thermal limits; thin film structures; weakly coupled GMR sandwiches; Anisotropic magnetoresistance; Conducting materials; Couplings; Giant magnetoresistance; Magnetic anisotropy; Magnetic films; Magnetic materials; Magnetostriction; Perpendicular magnetic anisotropy; Saturation magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
