Magnetic recording medium and magnetic recording medium driver for the medium with N-type ferrimagnetic recording layer
AssigneeFujitsu Limited
InventorsIkuya Tagawa, Koji Matsumoto
Life of this patent
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Abstract
A magnetic recording medium stable against heat of which high density recording can be attained is provided by employing a magnetic material such that coercive magnetic force in a recording magnetic layer increases with temperature rise. The magnetic recording medium is one in which the recording magnetic layer in which magnetic recording is carried out comprises an N-type Ferrimagnetic material, and compensation temperature of this N-type Ferrimagnetic material is made to be higher than an operating temperature range in which the magnetic recording medium is used.
Claims4
A magnetic recording medium for vertically magnetic recording, said medium comprising a magnetic recording layer in which magnetic recording is carried out, wherein:
- said magnetic recording layer comprises an N-type Ferrimagnetic material;
- said N-type Ferrimagnetic material includes an amorphous alloy consisting of at least one element selected from rare-earth elements and at least one element selected from transition metal elements;
- and
- a composition proportion of said at least one element selected from rare-earth elements in said amorphous alloy is adjusted such that a compensation temperature of said N-type Ferrimagnetic material is higher than an operating temperature range in which said magnetic recording layer is actually used;
- wherein said magnetic recording layer is set such that coercive magnetic force increases with temperature rise within the Operating temperature range, and
- wherein said operating temperature range is approximately 0° C. through 80° C.
A magnetic recording medium driver comprising:
- a magnetic recording medium for vertically magnetic recording, said magnetic medium including a magnetic recording layer in which magnetic recording is carried out;
- and
- a magnetic resistive head for recording information to said magnetic recording medium and reproducing information from said magnetic recording medium, wherein:
- said magnetic recording layer comprises an N-type Ferrimagnetic material;
- said N-type Ferrimagnetic material includes an amorphous alloy consisting of at least one element selected from rare-earth elements and at least one element selected from transition metal elements;
- and
- a composition proportion of said at least one element selected from rare-earth elements in said amorphous alloy is adjusted such that a compensation temperature of said N-type Ferrimagnetic material is higher than an operating temperature range in which said magnetic recording layer is actually used;
- wherein said magnetic recording layer is set such that coercive magnetic force increases with temperature rise within the operating temperature range, and
- wherein said operating temperature range is approximately 0° C. through 80° C.
Dependencies are inferred from the claim text.