Information reproduction head apparatus and information recording/reproduction system
AssigneeNEC Corporation
InventorKazuhiko Hayashi
Life of this patent
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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.
Claims13
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 direct contact with a magnetic domain control bias layer.
An information recording reproduction system comprising:
- a magnetic storage medium having a plurality of tracks for recording information;
- a magnetic recording apparatus for storing the information onto the magnetic storage medium;
- the 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 direct contact with a magnetic domain control bias layer;
- and
- an actuator connected to the magnetic recording apparatus and to the information reproduction head apparatus, for moving the magnetic recording apparatus and the information reproduction head to a selected one of tracks of the magnetic recording medium.
Dependencies are inferred from the claim text.