Patent ID: 6657823
Filing Date: 2003-12-02
Classification: B82Y,G01R,G11B

Abstract:
A reproducing sensor comprising:a multi-layer construction comprising a first magnetoresistive (MR) element, a second MR element, and a non-magnetic conductive layer formed therebetween the first and second MR elements which are connected in series; and a pair of electrodes for flowing an electric current perpendicularly to a film surface of the multi-layer construction, wherein the first MR element includes a first ferromagnetic layer (pin), a second ferromagnetic layer (free), and a non-magnetic insulating layer formed between the first and second ferromagnetic layers, wherein the second MR element includes a third ferromagnetic layer (free), a fourth ferromagnetic layer (pin), and a non-magnetic insulating layer formed between the third and fourth ferromagnetic layers, wherein magnetization directions of the first ferromagnetic layer and fourth ferromagnetic layer are arranged in antiparallel with each other, and magnetization directions of the second ferromagnetic layer and the third ferromagnetic layer are arranged in parallel with each other.