US 2003/0189802 A1 · Magnetic head

Abstract

The invention provides a magnetic domain controlling structure wherein a lamination stack M1 adjacent to a magnetoresistive stack of a GMR, CPP-GMR or TMR magnetic head has at least two magnetic films 14 and 16 anti-ferromagnetically coupled through a non-magnetic film 15, or the lamination stack M2 disposed on the end portions of the free layer of the magnetoresistive stack of the GMR magnetic head has a magnetic layer anti-ferromagnetically coupled to the free layer 2 through the non-magnetic film 27. Ferromagnetic film deposition dead zone area problems and the consequent problem of film rippling in free layer portions that reduces element sensitivity are prevented, as is the problem of increased error from read drift in the magnetic field exchange coupling method, resulting in a highly stable, highly sensitive MR head with no loss of magnetic field intensity.

Claims11

Dependent claims

A magnetic head comprising:

a reproducing head provided between a first magnetic shield and a second magnetic shield, having a magnetoresistive stack which has a free layer whose magnetic direction is rotated by a previously input magnetic field, a pinned layer whose magnetic direction is fixed, and a nonmagnetic layer provided between the free layer and the pinned layer, a lamination stack adjacent to the magnetoresistive stack which has at least two magnetic films coupled anti-ferromagnetically through a nonmagnetic film, and a pair of leads for supplying electric currents to the magnetoresistive stack;
and
a recording head having a first magnetic pole which is disposed adjacent to the second magnetic shield with an insulator between them and a second magnetic pole which is disposed adjacent to the first magnetic pole with a coil between them.

Dependencies are inferred from the claim text.

Magnetic head

Life of this patent

Magnetic head

Life of this patent

Abstract

Claims11