Patent ID: 6903906

Claim:
A magnetic bead 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 non-magnetic layer provided between the free layer and the pinned layer, a lamination stack adjacent to the magnetoresistive stack, and a pair of leads for supplying electric currents to the magnetoresistive stack; and a recording head baying a first magnetic pole which is disposed adjacent to the second magnetic shield with a first insulator between said first magnetic pole and said second magnetic shield, and a second magnetic pole which is disposed adjacent to the first magnetic pole with a coil between said first and second magnetic poles, wherein said lamination stack includes an anti-ferromagnetic film, first and second soft magnetic films, wherein said first and second soft magnetic films are coupled anti-ferromagnetically through a non-magnetic film, wherein said first magnetic pole is divided into two parts.