Magnetic disc storage system e.g. for computer - has double read-write head with magnetoresistive element for read head, formed as sandwich structure with layers of ferromagnetic anti-ferromagnetic and soft magnetic materials

摘要

The storage system uses a magnetoresistive element for reading and information from a magnetic material. The element is formed with a substrate (50), an anti-ferromagnetic film (32), a ferromagnetic film (11), non magnetic film (20), soft magnetic film (12), a further nonmagnetic film (20), a ferromagnetic film (11) and a final anti-ferromagnetic film (31) The anti-ferromagnetic films are of nickel oxide (31,32). The ferromagnetic film (11) is of either a NiFeCo alloy or a CoNiFe alloy. The soft magnetic film is of NiFe or NiFeCo. ADVANTAGE - Provides high recording density.