Current perpendicular-to-the-plane spin valve type...

G - Physics – 11 – B

Patent

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G11B 5/39 (2006.01)

Patent

CA 2227798

A transducer includes a spin valve ("SV") structure comprising a pinned ferromagnetic layer (98) adjoining a first end portion thereof and a freely rotating ferromagnetic layer (94) adjoining an oppositely disposed second end portion thereof. First and second current conductors (92, 104) adjoint the first and second end portions of the spin valve structure respectively in a current perpendicular-to-the-plane configuration ("cpp"). In a particular embodiment disclosed herein, a differential CPP transducer (120) includes a pair of SV structures (SV1, SV2) having first and second current conductors (132, 152) with a common current conductor (142) intermediate the SV structures.

Un transducteur comprend une structure à valve de rotation ("SV") comprenant une couche ferromagnétique goupillée (98) adjoignant une première partie extrême de la structure et une couche ferromagnétique à rotation libre (94) adjoignant une seconde partie extrême opposée de la structure. Des premier et second conducteurs de courant (92, 104) relient les première et seconde parties extrêmes de la structure à valve de rotation respectivement dans une configuration à courant perpendiculaire au plan ("CPP"). Dans un mode particulier de réalisation, un transducteur CPP (120) comprend une paire de structures SV (SV1, SV2) ayant des premier et second conducteurs de courant (132, 152) avec un conducteur de courant commun (142) intermédiaire entre les structures SV.

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