Patent ID: 6275360
Filing Date: 2001-08-14
Classification: G11B

Abstract:
A read-write head comprising an inductive write element for magnetically writing information in a medium; and a magnetoresistive read element for reading said written information by detecting a change in an electric signal produced by a change in a magnetic field leaking from the medium; said inductive write element and said magnetoresistive read element being formed on a single substrate;said inductive write element comprising a coil for generating a magnetic flux; a pair of magnetic cores for collecting said flux; and a write gap for generating a magnetic field, said write gap being arranged between said pair of magnetic cores;said magnetoresistive read element comprising a pair of shields formed of soft magnetic films; a magnetoresistive film arranged between said pair of shields; and a pair of leads electrically connected to said magnetoresistive film;wherein at least one of said pair of shields comprises a soft magnetic film having a magnitude of anisotropy field of 5 to 30 Oe and without an anti-ferromagnetic film therein; andwherein at least one of said pair of shields has an alloy selected from the group consisting of an alloy containing Ni of 80 to 90%, Fe of 10 to 20% and Co of 1 to 25% on the atomic ratio basis as base components; an alloy containing Co of 90 to 95%, Fe of 15 to 10% and Ni of 1 to 30% on the atomic ratio basis as base components; and an alloy containing Co of 30 to 70%, Ni of 10 to 40%, Fe of 5 to 25% and Pd of 5 to 20% on the atomic ratio basis as base components.