Heat-assisted magnetic recording method using eddy current and head for heat-assisted magnetic recording
AssigneeTDK Corporation
InventorsNaoki OHTA, Kosuke TANAKA
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Abstract
The present invention provides a heat-assisted magnetic recording method which can efficiently and locally heat the magnetic recording medium without a head which needs a great task in manufacture process. A heat-assisted magnetic recording method is provided, which comprises steps of: heating a portion of a magnetic recording layer included in a magnetic recording medium by generating an eddy current with applying a high-frequency magnetic field to said portion or a portion near said portion; applying a write magnetic field to at least a part of said portion on a state temporarily reducing a coercive force of said portion; and writing data to said magnetic recording medium.
Claims19
A heat-assisted magnetic recording method comprising steps of:
- heating a portion of a magnetic recording layer included in a magnetic recording medium by generating an eddy current with applying a high-frequency magnetic field to said portion or a portion near said portion;
- applying a write magnetic field to at least a part of said portion on a state temporarily reducing a coercive force of said portion;
- and
- writing data to said magnetic recording medium.
A thin-film magnetic head for a heat-assisted magnetic recording comprising:
- a high-frequency magnetic field generation element for heating a portion of a magnetic recording medium in writing by generating an eddy current with applying a high-frequency magnetic field to said portion or a portion near said portion;
- and
- a write head element for writing data signals by generating the signal magnetic field.
A head gimbal assembly comprising:
- a thin-film magnetic head comprising:
- a high-frequency magnetic field generation element for heating a portion of a magnetic recording medium in writing by generating an eddy current with applying a high-frequency magnetic field to said portion or a portion near said portion;
- and
- a write head element for writing data signals with generating the signal magnetic field;
- a support mechanism for supporting said thin-film magnetic head;
- trace conductors for said write head element;
- trace conductors for said read head element when said thin-film magnetic head comprises said read head element;
- and
- trace conductors for high-frequency magnetic field generation element.
A magnetic recording/reproducing apparatus comprising:
- at least one head gimbal assembly comprising:
- a thin-film magnetic head comprising:
- a high-frequency magnetic field generation element for heating a portion of a magnetic recording medium in writing by generating an eddy current with applying a high-frequency magnetic field to said portion or a portion near said portion;
- and
- a write head element for writing data signals by generating the signal magnetic field;
- a support mechanism for supporting said thin-film magnetic head;
- trace conductors for said write head element;
- trace conductors for said read head element when said thin-film magnetic head comprises said read head element;
- and
- trace conductors for high-frequency magnetic field generation element;
- at least one magnetic recording medium;
- and
- a recording/reproducing and heating control circuit for controlling read and write operations of said thin-film magnetic head to said at least one magnetic recording medium and for controlling a heat operation of said high-frequency magnetic field generation element.
Dependencies are inferred from the claim text.