Information reproduction head apparatus and information recording/reproduction system
AssigneeNEC Corporation
InventorKazuhiko Hayashi
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Abstract
The present invention provides a yoke-type information reproduction head apparatus 100 having a magnetic sensor block 3 provided on the substrate 1 via a non-magnetic insulation layer 2. The magnetic sensor 3 includes a ferromagnetic tunnel junction element 5 which is sandwiched between an upper electrode block 6 and a lower electrode block 7 and which is connected to a magnetic domain control bias layer 8. This enables to obtain preferable S/N and bit error rate with reduced waveform noise. This invention provides a yoke-type information reproduction head having both of the characteristics of the front yoke 4-1 as a magnetic path and a lower electrode 7 as an electric path.
Claims22
A yoke type information reproduction head apparatus comprising a magnetic sensor block placed on a non-magnetic insulation layer provided on a substrate, the magnetic sensor being connected to a magnetic pole and including a ferromagnetic tunnel junction element sandwiched by an upper electrode block and a lower electrode block,
- wherein the tunnel junction element is in junction with a magnetic domain control bias layer.
A yoke type information reproduction head apparatus comprising a magnetic sensor block placed on a non-magnetic insulation layer provided on a substrate, the magnetic sensor being connected to a magnetic pole and including a ferromagnetic tunnel junction element sandwiched by an upper electrode block and a lower electrode block,
- wherein the apparatus includes a front yoke block and a rear yoke block arranged at the opposing positions with respect to the tunnel junction element, the front yoke being located at the side of the tunnel junction element where a medium is present
Dependencies are inferred from the claim text.